S-91274A044 6-32 x 2" ASME B18.3, ASTM A574, ASTM B117 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.
• Superior corrosion resistance from the zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precision Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread form and drive integrity through repeated use.
• Coarse UNC thread design allows for quicker installation and better performance in materials prone to stripping or cross-threading.
• Partially threaded shank enables precise clamping force application, ideal for components requiring specific grip ranges.
• Hex socket drive facilitates easy installation with standard tools, reducing assembly time and improving workplace efficiency.

Professional Applications & Engineering Value

Engineered for demanding environments, this zinc-flake-coated alloy steel socket head cap screw addresses critical challenges in machinery, automotive, and heavy equipment sectors. The 6-32 UNC coarse thread and Class 3A fit ensure rapid, secure fastening in soft metals or plastics, resisting loosening under vibration. With a 170,000 psi tensile strength and corrosion-resistant coating, it withstands extreme operational stresses and exposure to moisture or chemicals, reducing downtime. The partially threaded design allows exact positioning in assemblies, making it ideal for precision fixtures, enclosures, and structural frames where reliability is non-negotiable.

Specification Summary & Compliance

This screw adheres to ASME B18.3 and ASTM A574 specifications for dimensional accuracy and material quality, with threads meeting Class 3A precision standards. It complies with ASTM B117 for corrosion testing, RoHS 3 (2015/863/EU) for restricted substances, and REACH (EC 1907/2006) for chemical safety, ensuring suitability for global industrial and electronic applications.