S-92949A318 1-72 x 3/16" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh environments
• Exceptional thread engagement and vibration resistance due to Class 3A fine thread fit and UNF thread form
• High-strength performance with a 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Secure, reliable fastening enabled by the fully threaded design and right-hand thread direction
• Easy, high-torque installation with the 0.050" hex drive and rounded button head style
• Precise dimensional consistency guaranteed by adherence to the ASME B18.3 standard
• Compliance with major environmental regulations including RoHS 3 and REACH for global market suitability

Professional Applications & Engineering Value

This 1-72 UNF fine thread screw is engineered for precision assemblies where reliability is non-negotiable. The combination of 18-8 Stainless Steel and a passivated finish provides excellent resistance to oxidation and chemical exposure, solving common failure points in electronics, aerospace components, and medical devices. The Class 3A thread fit and fine thread spacing ensure minimal backlash and superior clamp load retention in vibration-prone applications. Its rounded head and hex drive offer a low-profile, flush finish while allowing for high torque application without slippage, making it a trusted industrial fastener for critical engineering projects.

Specification Summary & Compliance

This screw features a Class 3A thread fit for precision UNF fine threads, a length of 3/16", and is fully threaded. Manufacturing and dimensional specifications strictly conform to ASME B18.3. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial use.