S-92220A183 1/4"-20 x 1/2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
• Exceptional hardness (Rockwell C39) provides excellent wear resistance and durability for long service life in demanding applications.
• Precise Class 3A thread fit offers tighter tolerances for secure, vibration-resistant assemblies and improved fatigue resistance.
• Low-profile socket head design allows for installation in confined spaces while providing a secure hex drive connection.
• Black-oxide surface treatment on alloy steel enhances corrosion resistance and provides a clean, professional appearance.
• Full thread engagement along the entire 1/2" length ensures maximum holding power and uniform stress distribution.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global industrial use.

Professional Applications & Engineering Value

This low profile socket head cap screw is engineered to solve critical challenges in precision assembly and machinery. The black-oxide alloy steel construction, combined with a Class 3A UNC thread and coarse spacing, delivers exceptional clamp load and vibration resistance in high-stress environments like automotive, aerospace, and heavy equipment. Its low-profile head and hex drive design enable easy installation in tight spaces where standard socket heads cannot fit, reducing assembly time and improving accessibility. With a fully threaded 1/4"-20 configuration, it ensures uniform load distribution, preventing loosening and maintaining joint integrity. Ideal for applications requiring reliable tensile strength and compliance with industrial standards, this fastener minimizes maintenance needs and enhances operational safety.

Specification Summary & Compliance

This socket head cap screw features a 1/4"-20 UNC coarse thread with a precision Class 3A thread fit for accurate engagement. Dimensions include a 1/2" length, 3/8" head diameter, and 1/8" head height, manufactured to meet ASTM A574 specifications for alloy steel socket head cap screws. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial use.