S-91870A220 10-32 x 5/8" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with Torx T25 drive for secure installations in restricted-access environments
• Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
• Reliable thread engagement with full-length Class 2A UNF fine threading for vibration-resistant assemblies
• Optimized flush mounting featuring 82° countersink angle and standard flat head profile
• High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness
• Regulatory compliance meeting ASME B18.3 standards and environmental regulations (RoHS 3, REACH)
• Precision dimensional control ensuring consistent 5/8" length and 0.411" head diameter for uniform installation

Professional Applications & Engineering Value

Engineered for high-security industrial applications, these 10-32 UNF flat head screws address critical challenges in access-controlled environments. The tamper-resistant Torx T25 drive prevents unauthorized disassembly while the 18-8 stainless steel material with passivated finish ensures long-term performance in corrosive conditions. The fully threaded design with Class 2A fit provides maximum thread contact for vibration-prone assemblies, while the 82° countersink angle creates seamless flush mounting in precision equipment. These security screws deliver exceptional value in electronic enclosures, machinery guards, and public infrastructure where tamper-proof fastening and environmental durability are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 2A thread fit for precision UNF fine threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features right-hand thread direction with 10-32 thread size, 0.19" thread diameter, and standardized 82° countersink geometry for consistent industrial performance.