S-91251A682 7/16"-14 x 3 1/4" 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 and heavy-duty applications, reducing the risk of fastener failure.
• Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
• Black-oxide finish on alloy steel offers enhanced corrosion resistance, extending service life in various industrial conditions.
• Partially threaded design allows for secure clamping where full threading isn't required, providing versatility and controlled grip length.
• Coarse UNC threads enable faster installation and are less prone to clogging in dirty or debris-filled environments, saving assembly time.
• 3/8" hex drive and standard socket head facilitate easy installation and removal with common tools, improving maintenance efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and adherence to international standards for global projects.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this Black-Oxide Alloy Steel Socket Head Cap Screw addresses critical challenges in machinery, automotive, and construction assemblies. Its high tensile strength (170,000 psi) and Rockwell C37 hardness provide durability under extreme loads, preventing stripping and fatigue. The UNC coarse thread and Class 3A fit ensure quick, secure fastening in high-vibration applications, reducing maintenance downtime. The partially threaded rod design offers precise clamping control, ideal for components requiring unthreaded shank sections. With a 3/8" hex drive, it supports efficient installation in confined spaces, enhancing productivity in OEM and MRO operations.

Specification Summary & Compliance

This fastener features a 7/16"-14 UNC thread with Class 3A precision fit and coarse spacing for robust performance. Dimensions include a 3 1/4" length, 21/32" head diameter, and 3/8" hex drive. It meets ASTM A574 specifications for high-strength socket head cap screws and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and reliability in global supply chains.