S-90357A028 3/8"-16 x 1 1/4" Alloy Steel Ultra-Low-Profile Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Strength & Durability: With a tensile strength of 140,000 psi and Rockwell C32 hardness, these screws provide reliable, long-lasting performance in demanding industrial environments.
• Superior Corrosion Resistance: The Black-Oxide finish on the Alloy Steel material offers enhanced protection against rust and wear, extending the fastener's service life.
• Precision Thread Fit for Secure Assembly: The Class 3A thread fit ensures tight, accurate engagement with mating parts, reducing the risk of loosening under vibration or load.
• Space-Saving Ultra-Low Profile Head: The ultra-low profile socket head design allows for installation in confined spaces where clearance is limited, without compromising on drive engagement.
• Efficient Installation with Hex Drive: The 3/16" hex drive enables quick and secure tightening using standard tools, streamlining assembly processes.
• Reliable Coarse Thread Performance: The 3/8"-16 UNC coarse thread facilitates faster installation and provides excellent holding power in a wide range of materials.
• Compliance with Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring they are safe for use in regulated industries and global markets.

Professional Applications & Engineering Value

Engineered for high-stress applications, these Black-Oxide Alloy Steel socket head cap screws address common industrial challenges such as vibration-induced loosening and corrosion. The ultra-low profile head is ideal for machinery, automotive assemblies, and precision equipment where space constraints demand a compact fastener design. The Class 3A thread fit and coarse UNC threads ensure consistent, reliable clamping force, reducing maintenance needs and improving overall assembly integrity. With a 140,000 psi tensile strength, they are suited for heavy-duty applications in construction, aerospace, and manufacturing, providing a dependable solution for engineers seeking durability and compliance with RoHS and REACH standards.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNC coarse thread with a Class 3A fit for precise thread engagement, and a length of 1 1/4" with a tight tolerance of -0.005" to 0.005". Manufactured from Alloy Steel with a Black-Oxide surface treatment, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.