S-91251A334 3/8"-16 x 1 5/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi for reliable performance in high-stress applications
• Superior corrosion resistance with black-oxide coating, extending service life in harsh environments
• Precise Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
• Partially threaded design provides optimal grip and alignment in machinery and equipment
• High hardness rating (Rockwell C37) maintains structural integrity under heavy loads
• Standard hex drive compatibility with 5/16" tools for efficient installation and maintenance
• Coarse UNRC threads enable quick assembly and disassembly in industrial settings

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this black-oxide alloy steel socket head cap screw delivers exceptional reliability in machinery, automotive, and heavy equipment assemblies. The ASTM A574 compliant construction combined with 170,000 psi tensile strength ensures these socket head cap screws withstand extreme mechanical stresses while maintaining dimensional stability. The Class 3A thread fit and partially threaded rod type provide superior clamping force distribution, preventing loosening in vibrating environments. The corrosion-resistant black-oxide surface treatment protects against industrial contaminants, making these inch-system fasteners ideal for precision engineering applications requiring consistent performance and durability.

Specification Summary & Compliance

This socket head cap screw features precision 3/8"-16 UNRC coarse threads with Class 3A thread fit tolerance for superior engagement. Manufacturing complies with ASTM A574 specifications for alloy steel socket head cap screws. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial use worldwide.