S-90696A288 5/16"-18 x 1/2" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Exceptional tensile strength of 70,000 psi provides reliable performance in high-stress applications
• Precision Class 3A thread fit ensures secure fastening and vibration resistance in critical assemblies
• Hex socket drive design allows for high torque application and easy installation in confined spaces
• Full threading along entire length maximizes grip strength and load distribution across joined materials
• Rockwell B70 hardness rating maintains structural integrity under repeated use and heavy loads
• Compliance with major industry standards including ASME B18.3 guarantees consistent quality and reliability

Professional Applications & Engineering Value

These 5/16"-18 UNC Socket Head Cap Screws deliver critical performance advantages in demanding industrial applications. The Black Oxide 18-8 Stainless Steel construction provides excellent corrosion resistance while maintaining high strength, making these fasteners ideal for machinery, automotive components, and outdoor equipment where environmental exposure is a concern. The coarse UNC thread pattern combined with Class 3A precision threading ensures rapid assembly and superior vibration resistance, reducing maintenance requirements in dynamic applications. The hex socket drive enables high-torque installation without stripping, while the fully threaded design provides consistent clamping force across the entire fastener length. These industrial fasteners solve common engineering challenges including corrosion-induced failure, thread stripping, and installation accessibility issues in confined spaces.

Specification Summary & Compliance

This socket head cap screw features 5/16"-18 UNC coarse threads with Class 3A thread fit for precision engagement and meets ASME B18.3 dimensional specifications. The fastener is manufactured from 18-8 Stainless Steel with Black Oxide finish and demonstrates compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. With a tensile strength rating of 70,000 psi and Rockwell B70 hardness, these screws maintain dimensional stability and mechanical properties under demanding service conditions.