S-98164A143 8-32 x 1" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty load-bearing applications.
• Precision thread fit with Class 3A UNC coarse threads ensuring secure, vibration-resistant fastening and easy installation.
• Enhanced durability and surface protection through passivated finish, extending service life by preventing oxidation and wear.
• Convenient and secure installation with a 3/32" hex drive and rounded button head design, allowing for high torque application and a low-profile, finished appearance.
• Full threading along the 1" length provides maximum grip and adjustment flexibility in various material thicknesses.
• Guaranteed quality and safety by meeting ASME B18.3 standards and being RoHS 3 & REACH compliant for regulated industries.

Professional Applications & Engineering Value

This 8-32 UNC threaded screw, crafted from 316 stainless steel, delivers critical performance in demanding sectors like marine, chemical processing, and food equipment manufacturing. Its inherent corrosion resistance is crucial for components exposed to moisture, chlorides, and acidic substances, preventing premature failure. The combination of a Class 3A thread fit and coarse thread spacing ensures a robust, vibration-proof connection that maintains integrity under dynamic loads. The passivated finish further fortifies the surface against pitting and galling, while the rounded button head with hex drive facilitates quick assembly and disassembly in tight spaces, reducing installation time and labor costs. These attributes make it an indispensable industrial fastener for applications where reliability, compliance, and long-term performance are non-negotiable.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards, including a Class 3A thread fit for superior tolerance and a UNC thread form per the inch system. Manufacturing and quality are governed by the ASME B18.3 specification (ASTM F879). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and safe for use in regulated environments.