S-91900A653 3/8"-16 x 1" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Tamper-resistant T45 Torx drive prevents unauthorized removal, enhancing equipment security in public or high-risk environments
• 18-8 stainless steel construction with passivated finish delivers superior corrosion resistance for long-lasting performance in harsh industrial conditions
• 70,000 psi tensile strength and Rockwell B70 hardness ensures reliable load-bearing capacity and resistance to deformation under stress
• Class 3A thread fit with UNC coarse threading provides precise, vibration-resistant fastening for critical assemblies
• Fully threaded 1" length design offers maximum grip range and adjustment flexibility across various material thicknesses
• Rounded button head profile creates a low-profile, snag-free surface while maintaining generous 0.656" bearing area
• Compliance with ASME B18.3 and environmental regulations guarantees quality assurance and safe usage in regulated industries

Professional Applications & Engineering Value

This 3/8"-16 UNC rounded head screw addresses critical security and durability challenges in industrial fastening. The tamper-resistant Torx T45 drive system provides deliberate access control for public infrastructure, machinery guards, and electronic enclosures where vandalism or unauthorized tampering poses operational risks. Manufactured from 18-8 stainless steel with passivated finish, the screw maintains integrity in corrosive environments including outdoor installations, chemical processing equipment, and marine applications. The Class 3A thread fit ensures consistent clamping force in high-vibration machinery, while the fully threaded design accommodates varying material thicknesses in assembly line production. These engineering features make it ideal for security panels, heavy-duty equipment manufacturing, and permanent installations requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

This fastener maintains Class 3A thread fit tolerance with UNC coarse threading (3/8"-16) and right-hand thread direction. Manufacturing specifications conform to ASME B18.3 standards for dimensional consistency and mechanical properties. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for hazardous substance restrictions, ensuring environmental responsibility in industrial supply chains.