S-90696A188 1/4"-28 x 1 5/8" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance in critical applications
• High tensile strength of 70,000 psi provides exceptional load-bearing capacity for demanding mechanical assemblies
• Optimized drive efficiency with 3/16" hex socket design allowing maximum torque transmission and strip-resistant installation
• Versatile partial threading enables precise clamp load distribution while facilitating alignment in assembled components
• Enhanced durability with Rockwell B70 hardness maintaining structural integrity under repeated stress cycles
• Regulatory compliance meets ASME B18.3 specifications and environmental standards for global industrial applications

Professional Applications & Engineering Value

This 1/4"-28 UNF socket head cap screw delivers exceptional engineering value through its fine thread configuration and 18-8 stainless steel composition. The Class 3A thread fit provides superior precision for applications requiring minimal backlash and vibration resistance, such as precision machinery, automotive assemblies, and industrial equipment. The partially threaded design allows for optimal stress distribution while the hex socket drive enables high-torque installation in confined spaces. With 70,000 psi tensile strength and corrosion-resistant properties, this fastener solves critical challenges in maintenance-intensive environments where reliability and longevity are paramount. The right-hand thread direction ensures compatibility with standard assembly processes across various industrial sectors.

Specification Summary & Compliance

This socket head cap screw features precision 1/4"-28 UNF fine threads with Class 3A fit tolerance for exceptional dimensional accuracy. Manufacturing complies with ASME B18.3 standards ensuring consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting the latest environmental regulations for industrial fastener applications. Thread specifications include minimum 1" thread length with standard socket head profile, manufactured to exacting inch system measurements for reliable interchangeability in mechanical assemblies.