Self-Drilling Screws Used in Roofing, Solar Structures, PEB Buildings & Steel Fabrication

Self drilling screw applications are common across roofing, solar projects, PEB buildings and steel fabrication because these fasteners can drill into suitable metal and create mating threads during the same installation operation.

For contractors and OEM manufacturers installing thousands of fasteners, reducing separate drilling operations can improve assembly speed and site productivity.

However, a self-drilling screw should not be selected only by diameter and length.

The buyer should also consider:

Total drilling thickness
Base material and grade
Drill-point geometry
Thread engagement
Head style
Washer system
Screw material
Heat treatment
Surface coating
Corrosion exposure
Installation conditions

These requirements become especially important for roofing screws, solar screws and PEB fasteners, where the fastener may remain exposed outdoors for many years.

This guide explains where self-drilling screws are used, what buyers should check for each industry, and how engineers can specify the correct fastener for bulk project and OEM requirements.

Quick Answer: Where Are Self-Drilling Screws Used?

Self-drilling screws are commonly used for fastening suitable metal components in:

Metal Roofing
Roof Cladding
Wall Cladding
PEB Buildings
Solar Equipment
Light-Gauge Steel
Steel Fabrication
HVAC Equipment
Industrial Enclosures
Warehouses
Factory Buildings
Telecom Equipment
Data Center Equipment
BESS Enclosures
Modular Buildings
Cold Storage Buildings

Their main advantage is that a suitable drill-point screw can drill, form the mating thread and fasten the components during one installation process.

The exact product must match the substrate and total drilling thickness.

Why Self-Drilling Screws Are Used in Industrial Projects

Industrial projects often contain thousands or even hundreds of thousands of fastening points.

Traditional installation may require:

Drill Hole → Position Component → Install Fastener

A correctly selected self-drilling screw can reduce these operations by drilling and fastening during installation.

This can provide:

Faster installation
Fewer separate drilling operations
Reduced tool changes
Efficient repetitive assembly
Easier site installation
Good suitability for sheet metal
Compatibility with powered installation tools

The productivity benefit becomes especially important in large roofing, PEB and industrial construction projects.

Major Industries Using Self-Drilling Screws

The main industries include:

Roofing & Cladding
PEB Manufacturing
Solar & Renewable Energy
Steel Fabrication
Warehousing
Industrial Buildings
HVAC
Electrical Equipment
Telecom Infrastructure
Data Centers
BESS
Industrial Machinery
Modular Construction
Cold Storage
Infrastructure Equipment
Material Handling Equipment

Each industry has different requirements for drilling capacity, corrosion resistance, sealing and joint performance.

Self-Drilling Screw Applications in Metal Roofing

Metal roofing is one of the largest application areas for roofing screws.

Typical fastening points include:

Profile Roofing Sheets
Metal Roof Panels
Roof Cladding
Flashings
Ridge Components
Roofing Accessories
Light-Gauge Steel Components

For roofing, the fastener does more than hold two materials together.

It may also form part of the weather-sealing system.

This makes the following factors especially important:

Drill point
Washer
EPDM sealing element
Head design
Corrosion protection
Installation torque

What Should Buyers Check in Roofing Screws?

When sourcing roofing screws in bulk, check:

1. Roofing Sheet Material

Confirm whether the sheet is:

Coated steel
Galvanized steel
Aluminium
Other specified material

2. Supporting Steel Thickness

The screw must drill through the roofing sheet and correctly engage the supporting material.

3. Drill-Point Capacity

The point must be suitable for the actual combined drilling thickness.

4. Washer System

For weather-exposed joints, verify:

Washer diameter
Metal backing
EPDM specification
Compression behaviour

5. Corrosion Protection

The coating should match the project’s environmental exposure and technical specification.

Why EPDM Washers Are Important for Roofing

Many roofing screws use a metal-backed EPDM sealing washer.

The washer system helps:

Distribute bearing load
Seal around the penetration
Reduce direct water entry
Support weather resistance

But performance depends on correct installation.

Over-tightening can damage or over-compress the sealing element.

Under-tightening can leave inadequate compression and affect sealing.

Therefore, roofing fastener quality should include both the screw and its washer system.

Self-Drilling Screw Applications in PEB Buildings

Pre-engineered buildings use large quantities of PEB fasteners for building-envelope and suitable secondary assemblies.

Common applications include:

Roofing Sheets
Wall Cladding
Flashings
Light-Gauge Components
Panel Systems
Secondary Accessories
Trim Components

PEB projects are especially attractive for bulk fastener manufacturers because individual projects can require large quantities of standardized screws.

What Should PEB Buyers Specify?

A PEB screw RFQ should ideally include:

Screw diameter
Screw length
Head style
Drive
Drill point
Roofing/cladding sheet thickness
Supporting steel thickness
Total drilling thickness
Washer requirement
Material
Coating
Corrosion requirement
Quantity
Project specification

A description such as:

5.5 × 25 mm PEB screw

is normally not enough for proper technical evaluation.

PEB Screws vs Structural Bolts

This distinction is important.

Self drilling screws can be suitable for roofing, cladding and certain secondary assemblies.

Primary structural connections may instead require engineered fastening systems such as:

High-strength bolts
Structural bolts
Anchor bolts
Other approved structural fasteners

A PEB fastener used for roofing should never automatically be treated as a replacement for a structural bolt.

The approved structural drawing and project specification should determine the connection method.

Self-Drilling Screw Applications in Solar Projects

Solar projects contain many steel, sheet-metal and equipment assemblies where solar screws or other industrial fasteners may be required.

Possible self drilling screw applications include:

Inverter Enclosures
Electrical Cabinets
Cable Management Components
Auxiliary Steel Components
Sheet-Metal Covers
Monitoring Equipment
Control Boxes
Equipment Housings
Certain Light-Gauge Steel Assemblies

Solar projects are long-life outdoor installations, so corrosion resistance and material compatibility become particularly important.

Important Note for Solar Structures

Not every connection in a solar mounting structure should use a self-drilling screw.

Load-critical connections may require:

Bolts
Nuts
Washers
Structural fasteners
Special clamps
Drawing-specific fastening systems

Self-drilling screws should only be used where the approved engineering design permits them.

For procurement teams, this means the fastener should be purchased against the project drawing or approved specification rather than simply replacing another fastener because installation appears easier.

What Should Solar Buyers Check?

For solar applications, evaluate:

Outdoor Exposure

The fastener may face:

Rain
Humidity
UV-exposed surroundings
Temperature cycling
Dust
Industrial atmosphere

Coastal Exposure

Projects near the coast may require stronger corrosion protection because of salt exposure.

Material Compatibility

The fastener may contact:

Galvanized Steel
Aluminium
Coated Steel
Stainless Steel

Possible galvanic interaction should be considered where dissimilar metals are used.

Project Design Life

Solar installations are generally expected to operate for many years, making long-term fastener durability important.

Self-Drilling Screw Applications in Steel Fabrication

Steel fabricators use self-drilling screws where quick joining of suitable sheet and light-gauge steel components is required.

Typical applications include:

Sheet-Metal Covers
Equipment Housings
Light Steel Frames
Industrial Cabinets
Guards
Cladding Components
Secondary Steel Assemblies

The biggest technical question is:

How much steel must the screw drill through?

This determines the required drill-point geometry.

Why Total Drilling Thickness Matters

Consider a joint containing:

0.8 mm outer sheet
3.0 mm supporting steel

The drill point must penetrate the complete material combination before proper thread engagement can occur.

This is why buyers should provide both:

Individual Material Thickness + Total Drilling Thickness

Two screws that look almost identical can perform very differently if their drill points are designed for different drilling ranges.

Self-Drilling Screws in HVAC Equipment

HVAC manufacturers commonly work with sheet-metal components.

Potential applications include:

Air Handling Units
Equipment Housings
Duct Components
Fan Covers
Access Panels
Brackets
Sheet-Metal Assemblies

Self-drilling fasteners can help reduce assembly steps where the joint design allows direct drilling and fastening.

Self-Drilling Screws in Industrial Buildings & Warehouses

Large industrial buildings may use these fasteners in:

Roofing
Wall Cladding
Flashings
Ventilation Components
Light-Gauge Secondary Assemblies
Building Accessories

For large warehouses and factories, installation speed and consistency can have a major effect on project productivity.

Self-Drilling Screws in Cold Storage Buildings

Cold storage and insulated building systems may require fasteners for:

Cladding
Sheet-Metal Components
Flashings
Equipment Covers
Supporting Accessories

Important considerations can include:

Moisture
Condensation
Temperature variation
Corrosion protection
Sealing requirements

The complete fastening system should match the building specification.

Self-Drilling Screws in Telecom & Data Center Equipment

Self-drilling screws may also be used for suitable sheet-metal assemblies in:

Telecom Cabinets
Network Enclosures
Data Center Infrastructure
Equipment Housings
Cable Management
Cooling Equipment
Power Equipment Enclosures

For these industries, buyers often prioritize:

Dimensional consistency
Clean installation
Corrosion protection
Reliable drive engagement
Controlled protrusion

Self-Drilling Screws in BESS Equipment

Battery Energy Storage Systems contain extensive electrical, cooling and enclosure equipment.

Possible applications include:

Battery Enclosures
HVAC Components
Control Cabinets
Inverter Housings
Monitoring Equipment
Sheet-Metal Covers
Cable Management Components

Because many BESS installations are outdoors, corrosion protection should be evaluated against the project environment.

Common Head Types by Application

Application	Common Head Consideration
Roofing	Hex Washer Head
PEB Cladding	Hex Washer Head
Solar Equipment	Hex / Pan / Drawing Specific
Steel Fabrication	Hex / Pan / Wafer
HVAC	Hex / Pan
Electrical Enclosures	Pan / Countersunk
Telecom Equipment	Pan / Low-Profile
Light-Gauge Steel	Wafer / Hex

These are common application patterns, not universal requirements. Final selection should follow the approved drawing.

Common Material Options

Depending on application, self-drilling fasteners may use:

Hardenable Carbon Steel

Common for:

Roofing
PEB
Steel Fabrication
HVAC
General Industrial Applications

Stainless Steel

Considered where increased corrosion resistance is required.

Bi-Metal Construction

May combine:

Corrosion-resistant stainless body
Hardened drilling section

This can be useful for demanding outdoor applications where both corrosion resistance and drilling performance are important.

How to Select Self-Drilling Screws by Application

Step 1: Identify the Industry

Is the application:

Roofing?
Solar?
PEB?
Steel Fabrication?
HVAC?
Industrial Equipment?

Step 2: Identify the Materials

Specify:

Material type
Material grade
Coating
Individual thickness

Step 3: Calculate Total Drilling Thickness

This is essential for selecting the correct drill point.

Step 4: Define the Joint Requirement

Consider:

Required holding strength
Thread engagement
Sealing
Corrosion resistance
Service environment

Step 5: Select Head and Washer

For roofing, an appropriate sealing washer system may be required.

For industrial equipment, a pan, hex, wafer or other head may be more suitable.

Step 6: Define Corrosion Requirements

Specify the required:

Material
Coating system
Coating thickness
Corrosion test, where required
Project-specific acceptance criteria

Roofing vs PEB vs Solar: How Screw Selection Changes

Although the same self drilling screw may appear suitable for several industries, the actual requirements can be very different.

Selection Factor	Roofing	PEB	Solar
Main Priority	Sealing + corrosion	Drilling + installation speed	Long-term outdoor durability
Typical Exposure	Rain / weather	Indoor & outdoor	Long-term outdoor
Washer	Often critical	Common for roofing/cladding	Application dependent
Drill Capacity	Important	Very important	Application dependent
Corrosion Protection	High priority	Project dependent	High priority
Material Compatibility	Important	Important	Very important
Structural Use	Engineering dependent	Engineering dependent	Engineering dependent

The approved project drawing should always control the final fastener specification.

Corrosion Protection for Outdoor Applications

Corrosion protection is especially important for roofing screws, solar screws and PEB fasteners because many installations remain exposed for years.

Before choosing a coating, evaluate:

Indoor or outdoor use
Rain exposure
Humidity
Coastal environment
Industrial pollution
Contact with dissimilar metals
Temperature cycling
Required project life
Customer specification

A coating should not be selected simply because it looks corrosion resistant.

Zinc Plated Self-Drilling Screws

Zinc plating is widely used for general industrial fasteners.

Typical applications can include:

Indoor PEB components
HVAC equipment
Electrical enclosures
Protected steel assemblies
General sheet-metal fabrication

Advantages include:

Economical
Widely available
Suitable for many protected applications

For long-term outdoor exposure, buyers should verify whether the specified zinc system provides enough corrosion resistance.

Zinc-Nickel Coated Screws

Zinc-nickel coatings may be considered for more demanding environments.

Applications can include:

Outdoor equipment
Solar-related equipment
Telecom enclosures
Industrial equipment
High-humidity installations

The required coating thickness and corrosion performance should be clearly defined in the technical specification.

Zinc Flake Coated Screws

Zinc flake coating systems may be considered for:

PEB projects
Solar equipment
Outdoor steel assemblies
Industrial infrastructure
Certain roofing applications

Potential benefits include:

Strong corrosion resistance
Relatively low coating thickness
Suitability for many outdoor applications

Buyers should specify the required coating system and performance rather than simply requesting “zinc flake.”

Stainless Steel Self-Drilling Screws

Stainless steel can provide higher corrosion resistance for demanding environments.

Common material grades may include:

SS304 / A2
SS316 / A4

Applications can include:

Coastal projects
Solar equipment
Facades
Outdoor enclosures
High-humidity installations

However, self-drilling performance must also be considered. Corrosion resistance alone does not guarantee that the screw can drill the required steel thickness.

Bi-Metal Self-Drilling Screws

Bi-metal screws can combine different materials to achieve different performance characteristics.

A typical design concept may combine:

Stainless steel body for corrosion resistance
Hardened drilling section for drilling capability

They may be considered for:

Solar projects
Coastal roofing
Facade systems
Outdoor PEB applications
Industrial infrastructure

Final suitability depends on the actual substrate, drilling requirement and project specification.

Salt Spray Requirements

Project buyers often request salt spray testing for outdoor fasteners.

A complete corrosion requirement should define:

Test standard
Test duration
Coating specification
White corrosion criteria, where applicable
Red rust criteria
Acceptance requirements

One important point:

Salt spray hours should not be directly converted into years of outdoor service life.

Laboratory corrosion testing is useful for comparing coating performance under defined conditions, but actual service life depends on the real environment.

Why Drilling Performance Matters

For self-drilling fasteners, dimensions alone do not prove that the product will work correctly.

A screw must successfully:

Start drilling
Penetrate the material
Form or engage the mating thread
Pull the components together
Seat correctly

Poor drilling performance can cause:

Slow installation
Point wear
Burnt drill points
Screw breakage
Tool wear
Installation delays
Increased labour cost

For large PEB, roofing and industrial projects, even a small increase in installation time per screw can become significant across thousands of fastening points.

Factors That Affect Drilling Performance

Drilling performance depends on:

Drill-point geometry
Screw diameter
Screw material
Heat treatment
Point hardness
Base material hardness
Total drilling thickness
Installation RPM
Installation pressure
Installation tool

For bulk OEM or project approval, functional testing using the actual or representative substrate is recommended.

Installation Control for Roofing Screws

Correct installation is particularly important when sealing washers are used.

Over-Tightening Can Cause

EPDM over-compression
Washer damage
Sheet deformation
Thread damage
Reduced sealing performance

Under-Tightening Can Cause

Poor clamping
Insufficient washer compression
Component movement
Water ingress

The installation method should therefore be considered part of the fastening system.

Self-Drilling Screw vs Self-Tapping Screw

These fasteners are related but should not be treated as identical.

Feature	Self-Drilling Screw	Self-Tapping Screw
Drill Point	Yes	Not necessarily
Creates Hole	Yes, within designed capacity	Usually requires prepared hole
Creates Mating Thread	Yes	Yes
Roofing	Very Common	Application dependent
PEB	Common	Application dependent
Sheet Metal	Excellent	Excellent
Separate Drilling	Usually Eliminated	Often Required

If drilling and fastening need to happen during the same installation operation, a self-drilling design may provide an advantage.

Self-Drilling Screw vs Structural Bolt

A self drilling screw and structural bolt perform very different jobs.

Feature	Self-Drilling Screw	Structural Bolt
Drills Its Own Hole	Yes, within rated capacity	No
Roofing / Cladding	Very Common	Limited
Light-Gauge Steel	Common	Application dependent
Primary Structural Connections	Generally not the default	Common
Nut Required	No	Usually
Installation Speed	Fast	Depends on joint
High-Load Structural Joint	Engineering dependent	Designed for structural applications

This distinction is particularly important in PEB and solar structures.

Do not replace a structural bolt with a self-drilling screw unless the connection has been specifically engineered and approved for that fastening system.

Common Engineering Mistakes

1. Selecting Only by Screw Size

A requirement such as:

5.5 × 25 mm self-drilling screw

does not provide enough information.

The engineer should also define:

Drill point
Base material
Total drilling thickness
Head
Washer
Material
Coating
Corrosion requirement

2. Ignoring Total Drilling Thickness

This is one of the most important errors to avoid.

The screw must drill through the complete material combination.

Always provide:

Individual Thickness + Material Grade + Total Drilling Thickness

3. Choosing the Wrong Drill Point

A point intended for thin sheet may not work correctly in thicker steel.

Possible problems include:

Slow penetration
Point damage
Excessive heat
Screw failure

4. Ignoring Thread Engagement

The drill point must pass through the material before sufficient thread engagement can develop.

Screw length should therefore account for both:

Drill-point length
Required thread engagement

5. Ignoring Corrosion Environment

A fastener suitable for an indoor warehouse may not be suitable for an exposed coastal solar project.

Environment should be considered during specification, not after installation.

6. Ignoring Material Compatibility

Solar, roofing and PEB systems may combine:

Aluminium
Galvanized steel
Coated steel
Stainless steel

Dissimilar metals should be evaluated for possible galvanic corrosion where relevant.

Common Procurement Mistakes

Buying Only by Lowest Price

For a project using hundreds of thousands of screws, poor quality can create costs through:

Slow installation
Drill-point failures
Corrosion
Roof leakage
Rework
Site delays
Replacement labour

Procurement should evaluate the total fastening performance, not only the price per piece.

Not Sharing the Application

Tell the manufacturer whether the requirement is for:

Roofing
Solar
PEB
Cladding
Steel Fabrication
HVAC
Industrial Equipment

Application information helps the supplier understand the required performance.

Not Providing Steel Thickness

A buyer asking for a self drilling screw without giving drilling thickness leaves one of the most important technical parameters undefined.

Provide the actual material stack whenever possible.

Not Sharing Annual Requirement

For repeat OEM or project supply, provide:

Order quantity
Annual requirement
Delivery schedule
Expected repeat frequency

This helps the manufacturer plan:

Raw material
Tooling
Production
Heat treatment
Coating
Packaging
Inventory

Quality Inspection Checklist

A quality plan for self-drilling screws may include:

Inspection Item	Check
Drawing / Standard Compliance	✓
Screw Diameter	✓
Length	✓
Thread Geometry	✓
Drill-Point Geometry	✓
Drill-Point Length	✓
Head Dimensions	✓
Drive Dimensions	✓
Washer Dimensions	✓
EPDM Requirement	✓
Material	✓
Hardness	✓
Heat Treatment	✓
Surface Coating	✓
Coating Thickness	✓
Visual Condition	✓
Drilling Performance	✓
Functional Installation	✓
Batch Traceability	✓
Required Certificates	✓

For roofing projects, the sealing washer system should also be inspected according to the approved specification.

OEM & Project RFQ Checklist

For an accurate quotation, buyers should provide:

☐ Screw Diameter
☐ Screw Length
☐ Thread Specification
☐ Drill-Point Type
☐ Required Drilling Capacity
☐ Head Style
☐ Drive Type
☐ Washer Requirement
☐ EPDM Requirement
☐ Screw Material
☐ Heat Treatment Requirement
☐ Surface Coating
☐ Corrosion Requirement
☐ Base Material
☐ Material Grade
☐ Individual Material Thickness
☐ Total Drilling Thickness
☐ Quantity per Order
☐ Annual Consumption
☐ Project Application
☐ Engineering Drawing
☐ Applicable Standard
☐ Inspection Requirements
☐ Test Requirements
☐ Packaging
☐ Delivery Schedule

A detailed RFQ reduces technical clarification and helps manufacturers quote the correct product.

What Should Bulk Buyers Ask a Self-Drilling Screw Manufacturer?

Before approving a manufacturer for roofing, solar or PEB requirements, ask:

Can you manufacture the required size and drill point?
What drilling thickness is the screw designed for?
How is drill-point geometry controlled?
What material is used?
How is heat treatment controlled?
Is drilling performance tested?
What coating systems are available?
Can you meet our corrosion requirement?
Can you supply screws with EPDM washers?
Can you manufacture according to our drawing?
What inspection reports can you provide?
Is batch traceability available?
What is the MOQ?
What is your production capacity?
Can you support scheduled repeat supplies?

For serious OEM sourcing, these questions are more useful than comparing quotations only on price.

Why Rajal Industries for Bulk Self-Drilling Screw Requirements?

Rajal Industries manufactures industrial fasteners for bulk OEM and project requirements.

Depending on the approved specification and manufacturing feasibility, requirements can include:

Standard Self-Drilling Screws
Custom Drawing-Based Screws
Roofing Screws
PEB Fasteners
Industrial Sheet-Metal Screws
Bulk OEM Production
Cold Forming
Thread Rolling
Controlled Heat Treatment
Surface Finishing
Dimensional Inspection
Mechanical Testing as Specified
Functional Drilling Evaluation
Batch Traceability
OEM Packaging
Export Supply Support

Target customers include:

PEB Manufacturers
Roofing Companies
Solar EPC Companies
Steel Fabricators
Industrial OEMs
HVAC Manufacturers
Electrical Equipment Manufacturers
Telecom Equipment Manufacturers
Renewable Energy Equipment Companies

Final manufacturability should be confirmed against the drawing, material, drilling requirement, coating, testing requirements and production quantity.

Frequently Asked Questions

Where are self-drilling screws commonly used?

Common self drilling screw applications include metal roofing, PEB buildings, steel fabrication, HVAC equipment, industrial enclosures and suitable solar equipment assemblies.

Which screws are commonly used for metal roofing?

Self-drilling roofing screws with an appropriate head and sealing washer system are commonly used. The correct product depends on the roofing sheet, supporting steel thickness and corrosion environment.

Are self-drilling screws used in PEB buildings?

Yes. PEB fasteners include self-drilling screws commonly used for roofing, wall cladding, flashings and suitable secondary assemblies.

Can self-drilling screws be used in solar structures?

They can be used for suitable sheet-metal, equipment and secondary applications where permitted by the engineering design. They should not automatically replace structural bolts or approved module-mounting fasteners.

What information is needed to select the drill point?

The supplier should know the base material, material grade, individual thicknesses and total drilling thickness.

Do roofing screws need EPDM washers?

Many weather-exposed metal roofing systems use screws with sealing washers. The exact washer requirement should follow the roofing-system specification.

Which coating is suitable for outdoor PEB projects?

The answer depends on the environment and project requirement. Zinc-nickel, zinc-flake systems, stainless steel or other specified solutions may be considered depending on corrosion exposure.

What is the difference between self-drilling and self-tapping screws?

A self-drilling screw includes a drill point designed to create the hole during installation. A self-tapping screw creates the mating thread but may require a prepared pilot hole.

Are self-drilling screws structural fasteners?

They can perform engineered fastening functions in specific systems, but ordinary roofing or cladding screws should not automatically be treated as substitutes for structural bolts.

Can custom self-drilling screws be manufactured for OEM projects?

Yes. Custom designs can be evaluated based on drawings, dimensions, drill-point requirements, materials, coatings, performance requirements and production volume.

Key Takeaways

Self drilling screw applications include roofing, PEB, steel fabrication, HVAC and selected solar equipment assemblies.
Roofing screws require attention to both fastening and sealing performance.
Total drilling thickness is one of the most important parameters for PEB and steel applications.
Solar projects require careful consideration of long-term corrosion and material compatibility.
Drill-point geometry, heat treatment and installation conditions affect drilling performance.
Roofing and cladding screws should not automatically replace structural bolts.
Bulk buyers should evaluate manufacturers on technical capability, quality control and repeat supply, not price alone.
A detailed RFQ helps prevent incorrect screw selection.

Conclusion

Self drilling screw applications extend across metal roofing, PEB buildings, solar equipment, steel fabrication and many other industrial assemblies where drilling and fastening efficiency are important.

However, each industry creates different technical requirements.

For roofing, buyers should focus on sealing, washer quality and corrosion protection. For PEB and steel fabrication, drill-point capability and total drilling thickness are critical. For solar projects, long-term outdoor exposure, corrosion resistance and material compatibility require special attention.

For bulk OEM and project requirements, Rajal Industries can evaluate standard and custom self-drilling screw requirements according to customer drawings, technical specifications, drilling conditions and expected production volumes.