S-92200A642 5/16"-18 x 2 1/2" MS16995-72, NAS1352C5-40, NASM16995, FF-S-86 Mil. Spec. 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish for extended service life in harsh environments
• High-strength performance with 80,000 psi tensile strength to withstand heavy loads and prevent fastener failure
• Precise thread engagement through Class 3A thread fit ensuring reliable, vibration-resistant connections
• Easy installation and removal with standard hex drive (1/4") providing secure tool grip and reducing assembly time
• Optimized thread design using coarse UNRC threads for quick assembly and reduced cross-threading risks
• Versatile partial threading allowing unthreaded shank sections for precise clamping and alignment in assemblies
• Full regulatory compliance meeting RoHS 3 and REACH environmental standards for global industrial use

Professional Applications & Engineering Value

This socket head cap screw delivers critical engineering solutions where corrosion resistance and high tensile strength are paramount. The 18-8 Stainless Steel construction with passivated finish provides exceptional protection against oxidation and chemical exposure, making it ideal for marine, chemical processing, and outdoor equipment applications. The Class 3A thread fit ensures tighter tolerances than standard fasteners, maintaining joint integrity under vibration and dynamic loads. With its coarse UNRC thread profile and partially threaded design, this screw enables rapid assembly while providing precise clamping force distribution. The hex drive system offers superior torque transmission compared to Phillips or slotted drives, reducing stripping and improving installation reliability in confined spaces common in machinery, automotive, and aerospace assemblies.

Specification Summary & Compliance

This socket head cap screw maintains Class 3A thread fit precision with UNRC coarse threads (5/16"-18) and right-hand thread direction. Manufacturing complies with MS16995-72, NAS1352C5-40, NASM16995, and FF-S-86 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for regulated industrial applications worldwide.