S-92210A346 1/4"-20 x 1/4" Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty fastening
• Precise, vibration-resistant fit ensured by Class 3A thread tolerance and UNC coarse threading for secure assembly
• Efficient installation and flush seating with hex drive design and 82° undercut flat head profile for countersunk applications
• Reduced risk of thread stripping through controlled partial threading and optimized thread engagement
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable usage

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 1/4"-20 UNC flat head screw delivers critical performance where reliability is non-negotiable. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to oxidation and chemical exposure, extending service life in machinery, automotive, and outdoor equipment. Its hex drive and undercut flat head design allow for high-torque installation and a smooth, flush finish, preventing snagging and improving aerodynamics in assembled products. The Class 3A thread fit and coarse thread spacing ensure quick assembly and superior vibration resistance, reducing maintenance needs in heavy-duty fastening applications.

Specification Summary & Compliance

This screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy. It is manufactured with a partially threaded shank and an 82° countersink angle for optimal seating. Compliance is confirmed with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for global industrial use.