S-90044A138 5/16"-18 x 1 3/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications
- Superior corrosion resistance provided by black-oxide coating on alloy steel for extended service life
- Precision Class 3A thread fit delivers secure fastening with minimal vibration loosening in demanding environments
- Optimized torque transmission through hex socket drive design prevents stripping and enables high clamping forces
- Coarse UNRC threads facilitate quick assembly and disassembly while maintaining strong holding power
- Rockwell C37 hardness provides excellent wear resistance and durability under repeated use
- Full regulatory compliance with ASTM A574, RoHS 3, and REACH ensures environmental and safety standards are met
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers critical performance advantages in demanding industrial settings. The combination of 170,000 psi tensile strength and Rockwell C37 hardness makes it ideal for heavy machinery, automotive assemblies, and precision equipment where vibration resistance and load-bearing capacity are paramount. The Class 3A thread fit with coarse UNRC threads ensures secure fastening in high-vibration environments while allowing for efficient installation. The hex socket drive design enables high torque application without slippage, making these socket head cap screws perfect for confined spaces where wrench clearance is limited. The black-oxide surface treatment provides corrosion protection, extending service life in challenging operating conditions.
Specification Summary & Compliance
This 5/16"-18 x 1 3/4" socket head cap screw features precision Class 3A thread fit with coarse UNRC threads and right-hand thread direction. Manufactured to ASTM A574 specifications, the fastener ensures dimensional accuracy and mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and regulatory adherence for industrial applications worldwide.
