S-90484A257 10-32 x 1/2" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior tamper resistance with specialized hex drive design for secure installations in public or high-security environments
• Exceptional corrosion protection through black-oxide coating that extends service life in demanding industrial conditions
• Precision thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance in machinery applications
• High-strength performance delivering 130,000 psi tensile strength for critical load-bearing applications
• Optimized drive efficiency with rounded button head profile providing smooth installation and reduced surface protrusion
• Enhanced durability through Rockwell C39 hardness rating maintaining structural integrity under repeated stress
• Full-threaded design offering maximum grip length and uniform stress distribution across the entire fastener

Professional Applications & Engineering Value

These 10-32 UNF black-oxide alloy steel rounded head screws deliver critical engineering solutions for industrial applications where security, precision, and durability are paramount. The tamper-resistant hex drive prevents unauthorized access in public infrastructure, electrical enclosures, and machinery guards, while the fine UNF threads provide superior vibration resistance in dynamic equipment. The black-oxide surface treatment creates a protective barrier against corrosion in manufacturing environments, extending maintenance cycles. With their Class 3A thread fit and fully threaded design, these fasteners ensure precise alignment and maximum clamping force in assembly operations, reducing the risk of loosening under operational stresses. The combination of high tensile strength and Rockwell C39 hardness makes them ideal for automotive components, industrial machinery, and electronic enclosures requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to exacting standards, these screws feature Class 3A thread precision with UNF fine threading (10-32) and 1/2" length. Compliance includes ASME B18.3 specifications (ASTM F835) for dimensional accuracy and performance. Environmental regulations adherence includes RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring safe use in various industrial applications while meeting international quality and environmental standards.