S-93190A557 1/4"-20 x 3 1/2" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh chemical and marine environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty applications
• Reliable fastening performance through UNC coarse threading and Class 2A thread fit ensuring secure connections
• Easy installation and removal with standard 7/16" external hex head design compatible with common tools
• Full-length threading provides consistent engagement across the entire 3½" length for maximum holding power
• Regulatory compliance meets ASME B18.2.1 specifications and environmental standards including RoHS 3 and REACH
• Dimensional precision with inch system measurements ensuring perfect fit in industrial equipment and machinery

Professional Applications & Engineering Value

This 316 stainless steel hex head screw delivers critical performance advantages in demanding industrial settings where corrosion resistance and structural integrity are paramount. The UNC coarse thread configuration with Class 2A fit provides excellent engagement in various materials while resisting vibration-induced loosening. The external hex drive and substantial 7/16" head width allow for high torque application without stripping, making installation efficient even in confined spaces. Engineered for heavy-duty applications including chemical processing equipment, marine hardware, and food processing machinery, this fully threaded fastener maintains its 70,000 psi tensile strength in extreme temperature fluctuations and corrosive atmospheres where ordinary fasteners would rapidly degrade.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 standards with Class 2A thread fit tolerances ensuring precise dimensional accuracy. The UNC 1/4"-20 coarse thread pattern provides optimal performance in most industrial materials. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations guarantees safe use across various applications. All dimensions conform to inch system specifications including 3½" length, 7/16" head width, and 1/4"-20 thread size for seamless integration with existing industrial equipment and components.