S-92562A306 5/16"-18 x 1 1/4" MS16997-81, NAS1352-5-20P Mil. Spec. Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 160,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from cadmium plating extends service life and maintains integrity in harsh environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening over time.
• High hardness rating (Rockwell C39) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Full NAS1352-5-20P/MS16997-81 certification guarantees compliance with rigorous aerospace and industrial standards for quality assurance.
• Coarse UNRC threads enable quicker installation and better performance in materials prone to galling or debris accumulation.
• Hex socket drive design allows for high torque application and easy access in confined spaces, improving assembly efficiency.

Professional Applications & Engineering Value

This cadmium-plated alloy steel socket head cap screw delivers critical reliability for demanding applications where failure is not an option. The combination of 160,000 psi tensile strength and Rockwell C39 hardness ensures exceptional resistance to both static and dynamic loads, making it ideal for heavy machinery, aerospace components, and precision equipment. The Class 3A thread fit with coarse UNRC threads provides superior vibration resistance while facilitating faster assembly in challenging materials. With full NAS1352-5-20P certification, this fastener meets the stringent requirements of defense and aerospace specifications, offering engineers a trusted solution for critical joints where safety and performance are paramount. The cadmium plating further enhances durability in corrosive environments, extending maintenance intervals and reducing lifecycle costs.

Specification Summary & Compliance

This socket head cap screw features precision 5/16"-18 UNRC coarse threads with Class 3A fit for superior dimensional accuracy. The fastener is manufactured to meet NAS1352-5-20P and MS16997-81 specifications, ensuring compliance with rigorous aerospace and industrial standards. With a 1-1/4" length and fully threaded design, it provides consistent engagement across the entire fastener length. The cadmium-plated alloy steel construction meets industry requirements for corrosion protection and mechanical performance in demanding applications.