S-90969A450 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 140,000 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 extends service life and maintains integrity in harsh or humid industrial environments.
• Precision Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening and enhancing assembly reliability.
• Knurled ultra-low socket head with hex drive allows for easy installation and removal in tight spaces, improving maintenance efficiency.
• Accurate 2" shoulder length with tight tolerances provides consistent alignment and spacing for rotating components like bearings and pulleys.
• High hardness (Rockwell C30) offers excellent wear resistance, ensuring the screw maintains its dimensional stability over repeated use.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global standards for industrial and commercial use.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and corrosion in machinery. The 3/8"-16 UNC coarse thread and Class 3A fit provide a robust, secure fastening solution that resists vibration and loosening in dynamic applications like automotive assemblies, conveyor systems, and precision instruments. The Black Oxide finish enhances durability by offering a protective layer against rust and oxidation, while the 2" shoulder length with precise tolerances ensures accurate positioning for rotating parts, reducing friction and extending equipment lifespan. Ideal for use in industrial settings requiring high strength and reliability, this screw supports efficient maintenance and long-term performance in harsh operating conditions.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 3A thread fit for high precision, along with a shoulder diameter of 1/2" and length of 2" with tight tolerances (e.g., shoulder diameter tolerance of -0.004" to -0.002"). Manufactured from alloy steel with a hardness of Rockwell C30 and tensile strength of 140,000 psi, it adheres to industry standards for durability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets environmental and safety regulations for global industrial use.