S-91251A670 7/16"-14 x 1 1/8" 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, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tight tolerances for secure, vibration-resistant assemblies in demanding environments.
• Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for long-term use.
• Hex socket drive design allows for high torque application and easy installation in confined spaces, improving assembly efficiency.
• Coarse UNC threads enable quick engagement and reduced cross-threading, speeding up installation in heavy-duty applications.
• Full threading along the 1 1/8" length ensures consistent grip and adjustability across the entire fastener for versatile mounting needs.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting global industry standards.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in industrial settings, such as vibration loosening and material fatigue. The high tensile strength and Rockwell C37 hardness provide durability under heavy loads, making it ideal for machinery, automotive, and construction applications. The coarse 7/16"-14 UNC threads with a Class 3A fit ensure precise alignment and resistance to wear, while the hex drive facilitates secure tightening in hard-to-reach areas. By combining robust materials with precise manufacturing, this screw delivers reliable fastening solutions that minimize maintenance and enhance operational safety in demanding environments.

Specification Summary & Compliance

This socket head cap screw features a 7/16"-14 UNC coarse thread with Class 3A fit for high precision, and dimensions including a 1 1/8" length, 3/8" hex drive, and standard socket head profile. It is manufactured from alloy steel with a black-oxide finish and meets ASTM A574 specifications for material quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.