S-91306A275 10-32 x 7/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress applications
• Precision Class 3A thread fit provides tighter tolerances for secure fastening in critical assemblies
• Full threading design maximizes grip length and distributes load evenly across the entire fastener
• Hardened alloy steel construction with Rockwell C39 hardness maintains thread integrity during repeated installations
• Convenient hex drive system allows for quick installation and removal with standard tools
• Comprehensive regulatory compliance meets ASME, ASTM, RoHS 3 and REACH standards for global acceptance

Professional Applications & Engineering Value

These 10-32 UNF Class 3A zinc-plated alloy steel rounded head screws deliver exceptional performance in precision engineering applications where vibration resistance and reliable clamping force are critical. The fine UNF thread pattern provides superior holding power in materials prone to stripping, while the button head profile offers a low-profile finish that clears obstructions in tight spaces. The zinc-plated surface treatment creates a protective barrier against corrosion in industrial environments, extending service life in machinery, electronic enclosures, and automotive assemblies. With fully threaded design and 1/8" hex drive, these fasteners ensure uniform stress distribution and straightforward installation using standard industrial tools.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances per UNF standards, these screws maintain precise dimensional accuracy for consistent performance. The 7/8" length and 0.19" thread diameter provide optimal engagement depth for various material thicknesses. Compliance with ASME B18.3 and ASTM F835 manufacturing specifications ensures mechanical reliability, while adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards confirms suitability for regulated industries and international markets.