S-90484A255 10-32 x 1/4" ASME B18.3, ASTM F835 Tamper-Resistant Hex-Drive Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized 5/32" hex drive design to prevent unauthorized removal in secure environments
• Superior corrosion protection through black-oxide coating on alloy steel, extending service life in demanding conditions
• Exceptional load-bearing capacity with 130,000 psi tensile strength and Rockwell C39 hardness for high-stress applications
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable fastening and vibration resistance
• Optimized head design featuring rounded button profile for reduced snagging and clean aesthetic integration
• Full threading coverage along the 1/4" length provides maximum grip strength and adjustment flexibility
• Regulatory compliance assurance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

These 10-32 UNF Class 3A black-oxide alloy steel rounded head screws address critical engineering challenges in industrial assembly and security-sensitive applications. The combination of fine UNF threading and Class 3A thread fit ensures precise alignment and maintains clamping force under vibration, making them ideal for electronics enclosures, machinery guards, and automotive components. The tamper-resistant hex drive provides an essential security layer against unauthorized access while the black-oxide surface treatment creates a durable barrier against oxidation and chemical exposure. With fully threaded design and 130,000 psi tensile strength, these fasteners deliver reliable performance in high-stress environments where joint integrity is paramount.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread tolerances for superior fit and performance. The 10-32 UNF fine thread configuration maintains precise engagement while the 1/4" length and 0.361" head diameter provide optimal fastening dimensions. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The black-oxide alloy steel construction delivers consistent performance with Rockwell C39 hardness and 130,000 psi tensile strength ratings.