S-91870A722 8-32 x 3/4" ASME B18.3 Tamper-Resistant Torx Plus Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with Torx Plus IPR20 drive prevents unauthorized access in security-sensitive installations.
• Superior corrosion resistance from 18-8 Stainless Steel and passivated finish ensures longevity in harsh environments.
• High mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness withstands heavy loads and vibration.
• Precise thread engagement via Class 3A UNC coarse threads provides reliable fastening and reduces cross-threading risks.
• Full-length threading offers maximum grip and uniform stress distribution across the entire fastener length.
• Standard 82° countersink angle allows flush mounting in prepared surfaces for a clean, professional finish.
• Compliance with major standards including ASME B18.3 ensures consistent quality and interoperability.

Professional Applications & Engineering Value

These 8-32 UNC flat head screws are engineered to address critical challenges in industrial and security applications where tampering and environmental durability are concerns. The 18-8 Stainless Steel construction, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making them ideal for outdoor equipment, electrical enclosures, and machinery in humid or corrosive settings. The Tamper-Resistant Torx Plus IPR20 drive not only deters vandalism but also allows for higher torque application without stripping, ensuring secure fastening in high-vibration environments like automotive assemblies or public infrastructure. With coarse thread spacing and Class 3A thread fit, installation is quick and reliable, reducing assembly time and maintenance needs in production lines or facility management.

Specification Summary & Compliance

This fastener adheres to ASME B18.3 specifications for dimensional accuracy and performance. Threads are manufactured to UNC standards with a Class 3A fit for precise tolerance, and the 82° flat head profile conforms to industry norms for countersunk applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in various industrial sectors.