S-91035A625 1/4"-20 x 1" ASTM A581, ASTM A582 Captive Panel Screws
Captive Panel Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior grip and torque application with knurled round head design for tool-free hand tightening in confined spaces
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Secure panel retention through partial threading and captive panel screw design preventing component loss
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening performance
- Dual drive compatibility featuring both thumb-operated knurling and slotted drive for flexible installation
- Regulatory compliance assurance meeting ASTM A581, RoHS 3, and REACH standards for global applications
- Optimized length-to-thread ratio (1" total length with 5/16" threading) for precise panel thickness accommodation
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw delivers exceptional value in panel mounting and electronic enclosure applications where frequent access is required. The knurled head texture provides positive grip even with oily hands or gloves, eliminating dropped fasteners in production environments. As a captive panel screw, it prevents loss during maintenance cycles while the partial threading ensures proper alignment and prevents over-tightening damage. The UNC coarse thread configuration resists cross-threading during repeated installations, making it ideal for industrial equipment, telecommunications cabinets, and test instrumentation where reliability and quick service access are critical.
Specification Summary & Compliance
This 1/4"-20 UNC thumb screw maintains Class 2A thread fit tolerances with coarse thread spacing for consistent engagement. Manufactured to ASTM A581 specifications for material quality and performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance. The right-hand thread direction and slotted drive style provide additional installation flexibility across various assembly scenarios.
