S-92198A112 1/4"-28 x 1 3/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• Fine UNF thread design provides better engagement and vibration resistance compared to coarse threads
• External hex drive with 7/16" head width allows for easy installation with standard tools and high torque application
• Class 2A thread fit guarantees precise, consistent threading for smooth assembly and disassembly
• Partial threading design offers optimal grip length control for specific fastening applications
• Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

These 1/4"-28 UNF hex head screws deliver exceptional engineering value in demanding industrial applications where corrosion resistance and high tensile strength are critical. The 18-8 stainless steel composition provides excellent protection against rust and chemical exposure, making them ideal for marine, chemical processing, and outdoor equipment applications. The fine UNF thread pattern ensures superior vibration resistance, preventing loosening in dynamic environments. With partial threading and external hex drive, these fasteners offer precise clamping force control and easy installation in confined spaces. The combination of 80,000 psi tensile strength and Rockwell B70 hardness ensures long-term reliability in structural assemblies, machinery, and heavy equipment where failure is not an option.

Specification Summary & Compliance

This 1/4"-28 UNF hex head screw features precise Class 2A thread fit tolerances and complies with ASME B18.2.1 manufacturing specifications. The fastener maintains dimensional accuracy with a 1-3/4" length and 3/4" minimum thread length. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in regulated industries. The right-hand thread direction and fine thread spacing meet standard UNF specifications for consistent performance across applications.