S-92210A385 10-32 x 4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Superior thread engagement and vibration resistance due to Class 3A thread fit and UNF fine threading for reliable, secure fastening
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Efficient installation and flush mounting with standard 82° countersink angle and 1/8" hex drive for streamlined assembly
• Full-length threading ensures maximum grip and adjustability across the entire 4" length
• Compliance with major industry standards including ASME B18.3, guaranteeing dimensional accuracy and interoperability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable usage

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address critical challenges in precision assembly and machinery. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making them suitable for aerospace, automotive, and electronic enclosures where durability is paramount. The Class 3A thread fit and UNF fine threads ensure minimal backlash and enhanced load distribution, reducing the risk of loosening under dynamic stresses. With a flat head design and hex drive, they allow for seamless, flush installations in countersunk holes, optimizing space and improving aesthetic integrity in finished products. This combination of high tensile strength and precise threading supports long-term reliability in high-vibration environments.

Specification Summary & Compliance

This product adheres to Class 3A thread fit tolerances per UNF standards, ensuring precise thread engagement. Manufacturing follows ASME B18.3 specifications for dimensional consistency. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. The screws are fully threaded with a length of 4", head diameter of 0.411", and drive size of 1/8", meeting rigorous industrial requirements for performance and safety.