S-90429A163 3/8"-24 x 6" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 130,000 psi tensile strength for demanding industrial applications
• Enhanced thread engagement through Class 3A fit and UNF fine thread design for vibration resistance
• Optimized material durability with alloy steel construction and Rockwell C39 hardness
• Secure installation control via 7/32" hex drive and standard 82° countersink angle
• Reliable partial threading design allowing precise clamping force distribution
• Full regulatory compliance meeting ASTM F835, RoHS 3, and REACH standards
• Right-hand thread orientation ensuring compatibility with standard assembly procedures

Professional Applications & Engineering Value

This 3/8"-24 UNF flat head screw delivers exceptional engineering value in heavy machinery, structural assemblies, and precision equipment where vibration resistance and high tensile strength are critical. The alloy steel construction with Rockwell C39 hardness provides superior durability against shear forces and environmental stressors. The UNF fine thread profile maintains secure fastening under dynamic loads, while the 82° countersink angle ensures flush mounting in precision applications. The partial threading design allows for optimal stress distribution across joined components, making it ideal for industrial fastening scenarios requiring reliable, long-term performance in challenging operating conditions.

Specification Summary & Compliance

Manufactured to ASTM F835 specifications with Class 3A thread fit ensuring precision tolerance. Features 3/8"-24 UNF fine threads in right-hand orientation with 1-1/2" minimum thread length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Inch system measurements include 6" length, 0.781" head diameter, and 7/32" hex drive size for standardized tool compatibility.