S-91870A622 1/4"-20 x 1" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Superior tamper resistance with specialized T30 Torx drive that prevents unauthorized removal in high-security applications
• Exceptional corrosion resistance through 18-8 stainless steel construction and passivated surface treatment for extended service life
• Maximum load-bearing capacity with 70,000 psi tensile strength and Rockwell B70 hardness for demanding industrial environments
• Precise thread engagement with Class 3A thread fit ensuring reliable fastening in critical assemblies
• Enhanced flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Full-threaded reliability providing consistent holding power across the entire 1" length
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for high-security industrial applications where tampering prevention is critical, these 18-8 stainless steel flat head screws deliver exceptional performance in demanding environments. The tamper-resistant T30 Torx drive provides superior anti-vandalism protection while maintaining easy installation for authorized personnel. The passivated finish significantly enhances corrosion resistance, making these fully threaded screws ideal for outdoor equipment, security panels, and machinery exposed to harsh conditions. With Class 3A thread fit and UNC coarse threading, these fasteners ensure reliable engagement in various materials while the 82° countersink angle creates seamless flush mounting for aesthetic and safety-critical applications.

Specification Summary & Compliance

This 1/4"-20 x 1" flat head screw features precision Class 3A thread fit with UNC coarse threading and right-hand thread direction. Manufactured to exacting ASME B18.3 specifications, the fastener maintains dimensional accuracy throughout its fully threaded design. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards ensures suitability for regulated industries, while the Rockwell B70 hardness and 70,000 psi tensile strength guarantee mechanical reliability in demanding applications.