S-90044A192 1/2"-20 x 1 7/8" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish for extended service life in harsh industrial environments
• Exceptional tensile strength of 170,000 psi prevents fastener failure under extreme loads
• Precision Class 3A thread fit ensures secure, vibration-resistant connections in critical applications
• High hardness rating (Rockwell C37) maintains dimensional stability and thread integrity
• Standard hex socket drive provides reliable torque transmission and installation convenience
• Full thread engagement along the entire 1 7/8" length for maximum holding power
• Regulatory compliance with ASTM A574, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

These black-oxide alloy steel socket head cap screws deliver critical performance advantages in demanding applications where corrosion resistance and high tensile strength are paramount. The Class 3A UNF fine threads provide superior clamping force distribution and vibration resistance in precision machinery, automotive assemblies, and heavy equipment. The 3/8" hex drive accommodates standard tools while the fully threaded design ensures consistent engagement depth. Engineered to withstand extreme mechanical stresses while maintaining thread integrity, these fasteners solve common industrial challenges including joint relaxation, environmental degradation, and installation inconsistency in critical bolting applications.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNF 1/2"-20 fine threading. The black-oxide alloy steel construction provides consistent mechanical properties including Rockwell C37 hardness and 170,000 psi tensile strength. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial applications requiring restricted substance control.