S-91251A357 10-32 x 4 1/2" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in machinery and equipment.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Hex socket drive design allows for easy installation and high torque application in confined spaces.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.
• Partially threaded shank enables optimal clamping force distribution, ideal for components requiring precise alignment.

Professional Applications & Engineering Value

These 10-32 UNF socket head cap screws are engineered with black-oxide alloy steel to address common industrial challenges like corrosion and mechanical stress. The fine UNF threads and Class 3A fit provide superior holding power in precision assemblies, minimizing loosening under vibration. With a minimum thread length of 7/8" and hex drive compatibility, they simplify installation in tight spaces, such as automotive, aerospace, and heavy machinery components. The high tensile strength and hardness ensure durability in demanding applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise engagement and meets ASTM A574 specifications for alloy steel socket head cap screws. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety. The UNF fine thread and dimensional accuracy support reliable performance in industrial fastening systems.