S-91255A242 10-24 x 1/2" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi provides superior resistance to breaking under extreme loads, ensuring long-term joint integrity.
• Class 3A thread fit guarantees precise, tight engagement for high-reliability assemblies with minimal risk of loosening.
• Black-Oxide finish on Alloy Steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
• Fully threaded coarse (UNC) design allows for faster installation and maximum thread contact, improving holding power in a wide range of materials.
• Rounded button head with 1/8" hex drive provides a low-profile, aesthetically clean finish while enabling secure tool engagement and reducing stripping.
• Rockwell C39 hardness ensures high durability and wear resistance, maintaining thread form and drive integrity through repeated use.
• Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH assures consistent quality, safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these 10-24 UNC screws with Class 3A thread fit deliver reliable performance in machinery, automotive, and electronic enclosures where vibration resistance is critical. The Black-Oxide Alloy Steel construction combats rust and wear, while the coarse thread spacing ensures quick, secure fastening in both soft and hard materials. The rounded button head design minimizes snagging and provides a flush finish, ideal for applications requiring a smooth surface profile. With a tensile strength of 120,000 psi and full threading, these screws prevent joint failure and simplify assembly processes, reducing downtime and maintenance costs in high-stress environments.

Specification Summary & Compliance

This screw features a 10-24 UNC thread size with Class 3A precision tolerance for consistent fit. Dimensions include a 1/2" length, 0.361" head diameter, and 1/8" hex drive. It is manufactured to meet ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.