S-91251A053 1 1/2"-6 x 7" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi provides superior load-bearing capacity for demanding industrial applications
• Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance and durability in harsh environments
• 1" hex drive socket enables high-torque installation and removal while minimizing tool slippage
• Partially threaded design with Class 2A thread fit ensures precise engagement and reliable fastening performance
• Rockwell C37 hardness maintains structural integrity under heavy loads and repeated use
• Coarse UNRC threads provide quick assembly and superior resistance to vibration loosening
• 7" length with 3 3/4" minimum thread length offers versatile fastening solutions for thick materials and structural components

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw delivers exceptional engineering value in heavy-duty applications where reliability is paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness ensures these fasteners withstand extreme mechanical stresses in machinery, construction equipment, and industrial assemblies. The 1" hex drive accommodates high-torque applications without stripping, while the partially threaded design with Class 2A thread fit provides precise alignment and secure fastening in critical joints. The black-oxide coating extends service life in environments where corrosion resistance is essential, making these socket head cap screws ideal for automotive, manufacturing, and structural applications requiring dependable, high-strength fastening solutions.

Specification Summary & Compliance

This socket head cap screw features inch system measurements with 1 1/2"-6 UNRC coarse threads and Class 2A thread fit for precise dimensional accuracy. Manufactured to ASTM A574 specification for high-strength alloy steel socket head cap screws, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for safe and sustainable industrial fasteners.