S-90044A243 3-48 x 1 1/4" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance from the black-oxide finish on alloy steel, providing enhanced durability and longevity in harsh industrial environments.
• Precise Class 3A thread fit offers tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening and maintenance needs.
• High hardness rating (Rockwell C37) delivers excellent wear resistance, maintaining thread integrity and drive engagement over repeated use.
• Compact 5/64" hex drive design allows for easy installation in confined spaces with standard tools, improving assembly efficiency.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and suitability for regulated industries.
• Partially threaded shank with coarse UNC spacing provides optimal grip and alignment in coarse-thread applications, speeding up installation.

Professional Applications & Engineering Value

These 3-48 UNC Socket Head Cap Screws are engineered to address critical challenges in precision machinery, automotive, and aerospace assemblies where space constraints and high vibration are common. The black-oxide alloy steel construction combats rust and wear, extending service life in humid or abrasive conditions. With a Class 3A thread fit and coarse thread spacing, they ensure rapid, secure fastening in materials prone to stripping, while the partially threaded design concentrates clamping force where needed. Ideal for industrial socket screw applications, they deliver consistent performance in jigs, fixtures, and engine components, reducing downtime and replacement costs.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy under the UNC (Unified Coarse) thread standard. Manufactured in compliance with ASTM A574 specifications for alloy steel socket head cap screws, it ensures material and mechanical reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and health safety in industrial use.