S-91251A348 10-32 x 1 1/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Precision Class 3A thread fit ensures tight, secure connections with minimal backlash, improving assembly accuracy and vibration resistance.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-galling surface for extended service life.
• Fine UNRF threads deliver superior holding power and better load distribution compared to coarse threads, ideal for precision adjustments.
• 5/32" hex socket drive allows for high-torque installation with standard tools, reducing stripping and enabling efficient maintenance.
• Full threading along the 1-1/8" length provides maximum grip and flexibility in various material thicknesses, simplifying inventory needs.
• Rockwell C37 hardness ensures high wear resistance and durability under repetitive or heavy-duty operating conditions.

Professional Applications & Engineering Value

This 10-32 UNRF Class 3A socket head cap screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and material fatigue. The black-oxide alloy steel construction, combined with a fine thread design, ensures secure fastening in precision machinery, automotive assemblies, and aerospace components where dimensional stability is paramount. Its high tensile strength and Rockwell C37 hardness make it suitable for demanding applications like heavy equipment and robotics, reducing maintenance downtime and enhancing operational reliability. The hex drive facilitates easy installation in confined spaces, while the fully threaded body accommodates varied clamp lengths, offering engineers a versatile and robust industrial fastener solution.

Specification Summary & Compliance

This socket head cap screw adheres to ASTM A574 specifications, ensuring consistent quality and performance. It features a Class 3A thread fit for precise tolerance and a UNRF fine thread profile with right-hand direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing and use in global markets.