S-92186A971 1 1/4"-7 x 5" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Optimized load distribution from the partially threaded design, enhancing grip and preventing joint loosening in structural applications
• Easy installation and removal with the external hex drive and 1 7/8" head width, compatible with standard tools for efficient maintenance
• Precise thread engagement ensured by UNC coarse threading and Class 2A fit, reducing cross-threading risks and improving assembly speed
• Long-term reliability backed by compliance with ASME B18.2.1 standards, ensuring dimensional accuracy and interchangeability
• Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations, supporting sustainable procurement goals

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 1 1/4"-7 UNC hex head screw in 316 Stainless Steel addresses critical challenges like corrosion-induced failure and vibration loosening. The coarse thread design excels in soft materials or high-vibration environments, maintaining clamp force where fine threads might fail. With a partially threaded shank, it concentrates stress away from the thread roots, enhancing fatigue resistance in heavy machinery, structural steel connections, and marine equipment. The external hex drive and large head width facilitate high-torque installation, ensuring secure fastening in confined spaces. Ideal for chemical processing, offshore platforms, and construction, it combines corrosion resistance with robust tensile strength to extend service life and reduce maintenance downtime.

Specification Summary & Compliance

This screw features a 1 1/4"-7 UNC coarse thread with Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It adheres to the ASME B18.2.1 standard for hex head bolts, ensuring reliable performance in mechanical and structural applications. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming the absence of restricted substances. The inch-based dimensions—5" length, 2 3/4" minimum thread length, and 25/32" head height—support precise engineering calculations and replacements.