S-90969A390 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black oxide finish protects against rust and wear in harsh industrial environments, extending service life.
• Superior Tensile Strength: Alloy steel construction delivers a robust 140,000 psi tensile strength, ensuring reliable performance under high-stress conditions.
• Precise Thread Fit & Stability: Class 3A thread fit provides tight tolerances for secure fastening and reduced vibration loosening in machinery.
• Optimized Shoulder Design: 1/2" shoulder diameter with controlled tolerances offers accurate alignment and acts as a pivot or bearing surface.
• Low-Profile Socket Head: Ultra-low knurled socket head with 1/4" hex drive allows for easy installation in confined spaces and improved grip.
• Coarse Thread Efficiency: 3/8"-16 UNC coarse threads enable quick assembly and disassembly, saving time in maintenance and production.
• Compliant & Safe for Global Use: Meets RoHS 3 and REACH regulations, ensuring environmental safety and suitability for international industrial markets.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and load-bearing challenges in precision assemblies. The alloy steel material, combined with a black oxide finish, provides exceptional resistance to corrosion and mechanical stress, making it ideal for automotive, aerospace, and heavy machinery applications. The Class 3A thread fit and UNC coarse threads ensure reliable engagement and ease of use in high-vibration environments, while the precisely machined 1/2" shoulder diameter serves as an accurate locating surface for rotating components like gears and pulleys. Its ultra-low profile socket head with knurling facilitates secure tool engagement in tight spaces, enhancing assembly efficiency and reducing downtime. This shoulder screw delivers consistent performance in jigs, fixtures, and pivoting mechanisms, offering long-term reliability and compliance with industry standards.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A fit for precise thread engagement and dimensional accuracy. Key specifications include a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent performance in precision applications. Manufactured from high-strength alloy steel with a black oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally regulated and industrial uses worldwide.