Captive Panel Screws
Captive Panel Screws are specialized fasteners designed to remain attached to the panel even when loosened, preventing loss and ensuring quick, tool-assisted access to electronic enclosures, industrial panels, and machinery covers. These screws provide secure fastening while allowing easy removal for maintenance, making them ideal for aerospace, telecommunications, medical devices, and electronics.
At Rajal Industries, we manufacture precision-engineered Captive Panel Screws that conform to ASME and general fastening standards, ensuring high durability, vibration resistance, and long-lasting performance.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Varies by panel and application | ASME B18.6.3 – American standard for machine screws and captive fasteners |
| General screw standards for captive panel applications |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Carbon Steel & Mild Steel | 4.6, 5.6, 8.8 | ASME B18.6.3, General Panel Fastener Standards |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506 |
| Hardened Steel (Heat Treated) | Class 8.8, 10.9, 12.9 | ASME B18.6.3, Industrial Captive Fastener Standards |
- Heat-Treated for Maximum Strength –Captive Panel Screws undergo precision hardening for long-term durability and mechanical stability.
- Load Ratings Based on Material & Application:
- Carbon Steel Class 8.8 Captive Panel Screw: 800-900 MPa tensile strength
- Stainless Steel A4-80 Captive Panel Screw: 700-800 MPa corrosion-resistant strength
Head & Captive Design Specifications
Captive Retention Feature for Loss Prevention
- Designed to stay attached to the panel even when unscrewed.
- Prevents misplacement of fasteners during maintenance and assembly.
Multiple Head Styles for Various Applications
- Slotted Head (ASME B18.6.3) – Used for simple tool-assisted access.
- Phillips Head (ISO 7045) – Ensures easy installation and quick removal.
Knurled Head Captive Screws – Allow hand-operated tightening and loosening without tools.
Retaining Washers & Spring Mechanisms for Secure Holding
- Captive screws are paired with retainer washers or locking rings for secure fitment in panels and enclosures.
Compatible with Multiple Drive Types
- Phillips Drive (Cross Recessed) – Ensures fast, slip-resistant torque application.
- Torx & Hex Drive – Provides higher torque resistance for high-vibration environments.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Provides fast penetration and strong grip | Equipment enclosures, electronic panels |
| Fine Thread (UNF/Metric Fine) | Ensures stronger holding power & secure retention | Aerospace, telecommunications |
| Fully Threaded Captive Panel Screws | Allows maximum adjustability and secure engagement | Industrial machinery, HVAC panels |
| Partially Threaded Captive Panel Screws | Provides better shear strength & controlled load transfer | Medical devices, precision engineering |
Thread Fitment & Compliance
- Metric threads conform to ISO 6g tolerances, ensuring secure engagement with panel mounts.
- Imperial captive panel screws meet ASME B18.6.3 for universal compatibility.
Common Applications of Captive Panel Screws
- Electronic Enclosures & Data Racks – Ensures secure fastening while allowing quick access to internal components.
- Telecommunications & Server Cabinets – Provides vibration-resistant, tool-assisted access for maintenance.
- Aerospace & Defense Equipment – Used in flight control panels, aircraft maintenance covers, and satellite enclosures.
- Medical Devices & Laboratory Equipment – Prevents fastener loss in diagnostic instruments and surgical tools.
- Automotive & Industrial Machinery – Ensures secure panel attachment with tamper-proof features.
Why Choose Rajal Industries for Captive Panel Screws?
Manufactured to International Standards
Ensuring precision engineering, durability, and compliance.
Captive Design for Secure & Easy Access
Eliminates fastener loss and improves assembly efficiency.
Customizable Retention Features
Available with spring-loaded, knurled, and tool-operated mechanisms.
Bulk & Custom Orders
Ideal for electronics, aerospace, and industrial applications.
High Durability & Tamper Resistance
Engineered for long-term, maintenance-free fastening.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com