S-92220A227 5/16"-18 x 2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding applications.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
• Low-profile socket head design allows for installation in confined spaces while maintaining high torque capability with a 5/32" hex drive.
• Partially threaded shank enables precise clamping force control, ideal for components requiring specific unthreaded grip lengths.
• Rockwell C39 hardness ensures excellent wear resistance and durability, minimizing deformation during repeated use.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chain requirements.

Professional Applications & Engineering Value

This 5/16"-18 UNC low socket head cap screw is engineered to address critical fastening challenges in machinery, automotive, and heavy equipment sectors. The black-oxide alloy steel construction combats rust and wear, while the coarse thread and Class 3A fit ensure rapid assembly and vibration resistance in high-load environments. The low-profile head with hex drive facilitates access in tight spaces, reducing installation time and improving structural integrity. Ideal for applications requiring partially threaded fasteners, it provides reliable clamping where precise unthreaded engagement is necessary, enhancing overall joint stability and longevity.

Specification Summary & Compliance

This screw adheres to inch system dimensions with a Class 3A thread fit per UNC standards, ensuring precise engagement and interchangeability. Manufacturing follows ASTM A574 specifications for alloy steel socket head cap screws, guaranteeing consistent mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally regulated industrial markets without hazardous substance restrictions.