S-91255A205 8-32 x 2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Superior load-bearing capacity from 120,000 psi tensile strength for heavy-duty applications
• Precise Class 3A thread fit ensures secure fastening and reduces assembly errors
• Full threading design provides maximum grip length and uniform stress distribution
• Hex drive compatibility enables high-torque installation with standard tools
• Rockwell C39 hardness maintains structural integrity under repeated stress
• Regulatory compliance meets ASME B18.3, ASTM F835, RoHS 3, and REACH standards

Professional Applications & Engineering Value

Engineered for demanding industrial assemblies, these 8-32 UNC thread rounded head screws combine black-oxide alloy steel construction with Class 3A thread fit to solve critical fastening challenges. The coarse thread spacing and fully threaded design prevent loosening in high-vibration machinery, while the hex drive style allows rapid installation in confined spaces. Ideal for automotive, heavy equipment, and structural applications where 120,000 psi tensile strength and corrosion resistance are paramount. The button head profile distributes clamping force evenly, protecting sensitive components from surface damage during torque application.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F835 specifications with Class 3A thread fit precision. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features UNC coarse threads in right-hand direction with 2" length and Rockwell C39 hardness verification. All dimensions conform to inch system measurements with 0.312" head diameter and 3/32" hex drive compatibility.