S-91870A829 10-32 x 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized T25 Torx drive for secure installations in high-security environments
• Superior corrosion resistance from 18-8 stainless steel construction with passivated finish for extended service life
• Precise thread engagement with Class 3A fine thread fit ensuring reliable fastening in critical applications
• High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for demanding loads
• Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Full regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
• Complete threading coverage along the 1/2" length for maximum grip strength and uniform load distribution

Professional Applications & Engineering Value

These 10-32 UNF flat head screws with tamper-resistant Torx T25 drive address critical security and reliability challenges in industrial settings. The 18-8 stainless steel material combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for harsh environments like outdoor equipment, marine applications, and chemical processing facilities. The Class 3A thread fit ensures precise mating with UNF threaded components, eliminating vibration-induced loosening in machinery and electronic enclosures. The 82° countersink angle and flat head profile enable seamless integration into panels and assemblies where protrusions are unacceptable, while the specialized drive system deters unauthorized access in public infrastructure, transportation, and security systems.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 standards with Class 3A thread fit precision for superior dimensional accuracy. The 10-32 UNF fine threads provide optimal engagement in thin materials and precision assemblies. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures safe usage across global markets. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance in high-stress applications.