S-92186A333 1/4"-28 x 4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh marine and chemical environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Precision fine threading with UNF 1/4"-28 and Class 2A fit ensures secure, vibration-resistant connections
• Optimized partial threading design provides enhanced grip and reduced risk of cross-threading in critical assemblies
• Industry-standard compliance with ASME B18.2.1 specifications guarantees dimensional accuracy and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global market acceptance
• Secure external hex drive with 7/16" head width enables efficient installation with standard tools

Professional Applications & Engineering Value

This 316 stainless steel hex head screw delivers critical performance advantages in demanding industrial applications where corrosion resistance and mechanical reliability are paramount. The UNF fine thread configuration with Class 2A thread fit provides superior vibration resistance in machinery, marine equipment, and chemical processing systems where loosening under dynamic loads poses significant operational risks. The partially threaded design concentrates engagement strength where needed most, while the external hex drive ensures straightforward installation in confined spaces. Engineered to withstand aggressive environments without compromising structural integrity, this fastener solves the dual challenge of corrosion protection and mechanical durability that plagues conventional fasteners in offshore, food processing, and pharmaceutical applications.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 dimensional standards with Class 2A thread fit tolerance for precision engagement. The 1/4"-28 UNF fine thread configuration ensures consistent performance across compatible components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations confirms material safety and global market acceptability. The inch system measurements maintain dimensional consistency with North American industrial standards.