S-90344A121 8-32 x 3/4" ASTM A574 Socket Head Screws with Flat Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish on both screw and washer for extended service life in harsh environments
• Exceptional load-bearing capability with 170,000 psi tensile strength to withstand high-stress applications
• Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
• Enhanced installation efficiency with integrated flat washer that distributes load and prevents surface damage
• Optimized drive performance with standard hex socket and 9/64" drive for secure tool engagement and torque transmission
• Robust material performance with Rockwell C39 hardness providing excellent wear resistance and durability
• Environmental compliance assurance meeting RoHS 3 and REACH standards for sustainable manufacturing

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws with integrated flat washers deliver critical performance advantages in demanding industrial applications. The 8-32 UNC coarse thread configuration combined with Class 3A thread fit ensures rapid assembly while maintaining superior vibration resistance in machinery, automotive components, and heavy equipment. The black-oxide surface treatment on both screw and washer provides essential corrosion protection, extending service life in environments exposed to moisture, chemicals, or outdoor conditions. The fully threaded design allows for maximum adjustability and clamping force distribution, while the hex socket drive enables high-torque installation in confined spaces where wrench clearance is limited. This combination of features makes these screws ideal for precision assemblies requiring reliable, long-term fastening solutions.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications, these socket head cap screws feature precise 8-32 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. The fasteners maintain Rockwell C39 hardness and 170,000 psi tensile strength throughout the 3/4" fully threaded length. The integrated flat washer with 7/16" outer diameter complements the assembly system. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards ensures these components meet international regulatory requirements for industrial use.