S-92220A185 1/4"-20 x 3/4" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide surface treatment, extending service life in demanding environments
• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress applications
• Precision Class 3A thread fit provides secure fastening with minimal backlash in critical assemblies
• Low-profile socket head design enables installation in confined spaces while maintaining hex drive reliability
• Full thread engagement along the entire 3/4" length for maximum grip and load distribution
• Rockwell C39 hardness maintains thread integrity and drive socket durability through repeated use
• Regulatory compliance with ASTM A574, RoHS 3, and REACH ensures environmental and quality standards

Professional Applications & Engineering Value

These low profile socket head cap screws deliver critical engineering solutions where space constraints meet high-strength requirements. The black-oxide alloy steel construction provides superior corrosion resistance compared to standard finishes, while the Class 3A UNC coarse threading ensures rapid assembly with exceptional vibration resistance. The combination of 140,000 psi tensile strength and Rockwell C39 hardness makes these fasteners ideal for precision machinery, automotive components, and industrial equipment where reliability cannot be compromised. The hex drive socket maintains torque transmission efficiency even in low-clearance applications, solving common accessibility challenges in compact designs.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with Class 3A thread fit for precision applications. Features 1/4"-20 UNC coarse threading with fully threaded 3/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The black-oxide surface treatment on alloy steel provides consistent corrosion protection while maintaining dimensional accuracy.