S-91251A326 1"-14 x 7" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in harsh environments.
• Precision Class 3A thread fit guarantees tight tolerances and secure fastening for critical assemblies.
• High hardness rating (Rockwell C37) provides excellent wear resistance and durability under repeated use.
• 3/4" hex drive design allows for easy installation and high torque application with standard tools.
• Partially threaded shank offers optimal grip and alignment in demanding mechanical setups.
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global supply chains.

Professional Applications & Engineering Value

This socket head cap screw is engineered with black-oxide alloy steel and UNRF fine threads to address common industrial challenges such as vibration loosening and corrosion-induced failure. Its Class 3A thread fit and 1"-14 thread size deliver precise engagement in machinery, automotive, and heavy equipment applications, reducing assembly errors. The partially threaded design concentrates clamping force where needed, while the ASTM A574 certification assures consistent quality for high-strength fastening in critical engineering projects.

Specification Summary & Compliance

This screw meets Class 3A thread fit tolerances per UNRF standards, with a minimum thread length of 2 1/2" and fine thread spacing. It conforms to ASTM A574 for material and manufacturing specifications, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international safety and environmental guidelines.