S-92185A605 5/16"-18 x 4" Super-Corrosion-Resistant 316 Stainless Steel Socket 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 reliable load-bearing performance
• Precision thread engagement with Class 3A fit ensuring consistent, vibration-resistant fastening in critical assemblies
• Enhanced durability through passivated surface treatment that improves corrosion resistance and extends service life
• Secure hex drive operation with 1/4" drive size providing positive torque transmission and reduced stripping risk
• Versatile partial threading allowing both threaded engagement and smooth shank functionality in various mounting scenarios
• Regulatory compliance with RoHS 3 and REACH standards, ensuring environmental safety and global market acceptance

Professional Applications & Engineering Value

These 316 stainless steel socket head cap screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The combination of Class 3A thread fit and coarse UNC threading provides superior vibration resistance in machinery, automotive, and marine equipment, while the passivated finish significantly enhances protection against chemical attack and atmospheric corrosion. The partially threaded design offers engineering flexibility for applications requiring both precise clamping force and unthreaded bearing surfaces. With their 70,000 psi tensile strength and hex socket drive, these fasteners maintain integrity under high-stress conditions while enabling efficient installation in confined spaces common in industrial assembly operations.

Specification Summary & Compliance

This 5/16"-18 UNC socket head cap screw features precise Class 3A thread fit tolerances according to Unified Thread Standard specifications, ensuring consistent engagement and reliable performance. The fastener maintains 4" overall length with minimum 1 1/8" thread length and standard coarse thread spacing for optimal installation efficiency. Manufacturing compliance includes full conformance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, guaranteeing restricted substance compliance for international industrial applications.