S-91274A308 3/8"-16 x 1" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (170,000 psi) ensures reliable performance under high-stress conditions, reducing failure risks in demanding applications
• Superior corrosion resistance from zinc-flake coating extends service life and maintains integrity in harsh industrial environments
• Precision Class 3A thread fit provides tighter tolerances for secure fastening and vibration resistance in critical assemblies
• High hardness rating (Rockwell C37) offers excellent wear resistance and durability for repeated use
• Standard hex drive design (5/16") enables easy installation and removal with common tools, improving maintenance efficiency
• Full threading along the 1" length ensures maximum engagement and load distribution across connected components
• Compliance with major standards including ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability

Professional Applications & Engineering Value

This zinc-flake-coated alloy steel socket head cap screw delivers critical performance advantages for industrial applications where reliability is paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness provides exceptional resistance to mechanical stress and wear, making it ideal for heavy machinery, automotive assemblies, and precision equipment. The 3/8"-16 UNC coarse thread with Class 3A fit ensures secure fastening in high-vibration environments, while the corrosion-resistant zinc-flake coating protects against degradation in challenging conditions. Engineered to meet ASME B18.3 specifications, these screws offer consistent dimensional accuracy and reliable performance in critical fastening applications where failure is not an option.

Specification Summary & Compliance

This socket head cap screw features precise Class 3A thread fit with 3/8"-16 UNC coarse threading and right-hand direction. Manufactured according to ASME B18.3 and ASTM A574 specifications, it ensures dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety standards for industrial use worldwide.