S-92186A966 1 1/4"-7 x 4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads
• Rockwell B70 hardness provides excellent durability and resistance to wear
• Coarse UNC thread enables faster installation and reduced cross-threading risk
• External hex drive and large head offer secure, high-torque tightening with standard tools
• Class 2A thread fit guarantees consistent, precise assembly with standard nuts
• Partial threading design allows for effective clamping across unthreaded sections

Professional Applications & Engineering Value

This 1 1/4"-7 UNC hex head screw in 316 stainless steel is engineered for demanding industrial applications where corrosion and high stress are primary concerns. The coarse thread design ensures rapid assembly in structural steel, heavy machinery, and marine equipment, minimizing installation time. The external hex drive and substantial head dimensions provide superior grip for high-torque applications, preventing tool slippage. With a 70,000 psi tensile strength and Rockwell B70 hardness, it maintains integrity in vibration-prone environments, offering long-term reliability for construction, chemical processing, and offshore installations. The partially threaded shank is ideal for applications requiring precise clamping force distribution.

Specification Summary & Compliance

This screw features a 1 1/4"-7 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy. It is manufactured in compliance with ASME B18.2.1 specifications, ensuring interchangeability and performance reliability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use.