S-91255A083 2-64 x 3/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on alloy steel, extending service life in demanding industrial environments.
• Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
• Precise Class 3A thread fit provides tighter tolerances for secure fastening and vibration resistance in fine-thread applications.
• Hex drive design (0.050") allows for easy installation with standard tools, minimizing assembly time and tool slippage.
• Fully threaded 3/8" length offers maximum grip and adjustment flexibility across various material thicknesses.
• Rounded button head profile delivers a low-profile, aesthetically clean finish while reducing snagging hazards.
• Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interoperability in regulated assemblies.

Professional Applications & Engineering Value

Engineered for precision industrial applications, this 2-64 UNF fine thread screw addresses critical needs in electronics, aerospace, and machinery where vibration loosening and space constraints are common. The black-oxide alloy steel construction combats oxidation and wear, while the Rockwell C39 hardness ensures durability against deformation. Its fully threaded hex drive design simplifies maintenance and provides uniform clamping force, making it ideal for securing components in assemblies requiring high-strength fasteners with reliable, repeatable performance.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit per UNF standards, ensuring precise dimensional accuracy. It meets ASME B18.3 and ASTM F835 manufacturing specifications for consistency and safety. The product is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmentally responsible sourcing and use in global markets.