S-90357A112 2-56 x 1/4" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 psi provides reliable holding power in demanding applications
• Class 3A precision thread fit ensures superior engagement and vibration resistance in critical assemblies
• Black-oxide coating on alloy steel offers enhanced corrosion resistance for extended service life
• Ultra-low profile socket head enables installation in confined spaces with minimal clearance requirements
• Rockwell C32 hardness rating maintains thread integrity and prevents stripping during repeated use
• Coarse UNC threading facilitates quicker assembly and reduces cross-threading risks
• Full threading along the 1/4" length allows for flexible positioning and maximum grip range

Professional Applications & Engineering Value

Engineered for precision industrial applications, these socket head cap screws combine black-oxide alloy steel construction with Class 3A UNC threads to solve critical fastening challenges. The ultra-low profile head design addresses space constraints in compact assemblies while maintaining full hex drive functionality. With 140,000 psi tensile strength and Rockwell C32 hardness, these fasteners withstand high-stress environments in machinery, aerospace components, and electronic enclosures where vibration resistance and dimensional stability are paramount. The coarse thread pitch ensures rapid installation in production environments while the black-oxide surface treatment provides essential corrosion protection for long-term reliability.

Specification Summary & Compliance

This 2-56 UNC thread socket head cap screw features Class 3A thread fit precision with length tolerance of -0.005" to 0.005". Manufactured to inch system standards with fully threaded design and right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.