S-91255A279 12-24 x 3/8" 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
• High tensile strength of 120,000 psi ensures reliable performance under heavy loads
• Precise Class 3A thread fit provides superior engagement and vibration resistance
• 5/32" hex drive design allows for easy installation with standard tools, reducing assembly time
• Fully threaded coarse UNC pattern delivers faster driving and strong holding power
• Rockwell C39 hardness enhances durability and reduces wear during repeated use
• Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interchangeability

Professional Applications & Engineering Value

This 12-24 UNC screw with black-oxide alloy steel construction is engineered to address common industrial challenges such as corrosion and mechanical stress. The coarse thread and Class 3A fit ensure secure fastening in materials prone to stripping, while the rounded button head and hex drive facilitate quick, tool-friendly installation in tight spaces. Ideal for machinery, automotive assemblies, and electrical enclosures, it provides long-term reliability by resisting environmental degradation and maintaining high tensile strength under dynamic loads, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw features precise UNC coarse threads with a Class 3A fit for accurate engagement, manufactured to ASME B18.3 and ASTM F835 standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial applications.