S-90044A296 6-32 x 4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 170,000 psi ensures reliable performance under extreme mechanical loads
• Exceptional corrosion resistance from black-oxide coating extends service life in harsh environments
• Precise Class 3A thread fit guarantees secure fastening with minimal vibration loosening
• Optimized drive engagement with hex socket design prevents stripping during high-torque installation
• Rockwell C37 hardness maintains structural integrity through repeated assembly cycles
• Regulatory compliance with RoHS 3 and REACH meets international environmental standards
• Versatile partial threading allows for both clamping and alignment functions in complex assemblies

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws solve critical fastening challenges in heavy machinery, automotive systems, and precision equipment. The 6-32 UNC coarse thread configuration provides rapid installation while maintaining Class 3A precision for vibration-resistant connections. The ASTM A574 certified material combined with 170,000 psi tensile strength ensures structural integrity in high-stress applications. The 4" length with partial threading offers flexibility for both deep engagement and clearance requirements. The black-oxide surface treatment creates a protective barrier against industrial corrosion while the hex socket drive enables high-torque installation in confined spaces.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with Class 3A thread fit (UNRC-3A) ensuring precision tolerance. The 6-32 UNC coarse thread follows standardized inch system requirements with 0.138" thread diameter and 3/4" minimum thread length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification includes Rockwell C37 hardness verification and 170,000 psi minimum tensile strength testing.