S-90344A113 10-32 x 1" ASME B18.3, ASTM A574 Socket Head Screws with Flat Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating on both screw and washer, ideal for harsh industrial environments
• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
• Precision Class 3A thread fit provides tighter tolerances for secure fastening in critical assemblies
• Integrated flat washer design distributes load evenly and prevents surface damage during installation
• Rockwell C39 hardness maintains structural integrity and resists wear over repeated use cycles
• Full UNF fine threading offers enhanced grip and vibration resistance in precision machinery
• 5/32" hex drive compatibility enables efficient installation with standard industrial tools

Professional Applications & Engineering Value

Engineered for demanding applications where corrosion resistance and high tensile strength are critical, these black-oxide alloy steel socket head cap screws solve common industrial challenges. The Class 3A UNF fine threads provide superior engagement in precision equipment, reducing the risk of loosening under vibration. Combined with the integrated flat washer, this fastener distributes clamping force effectively across surfaces, preventing damage to sensitive components. Ideal for industrial machinery, automation systems, and precision instruments requiring reliable fully threaded fasteners that maintain performance in corrosive environments while meeting strict engineering specifications.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit and UNF fine threading. Material compliance includes ASTM A574 alloy steel with black-oxide surface treatment. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Dimensions include 1" length, 10-32 thread size, 5/16" head diameter, and 7/16" washer OD with 0.036" thickness.