S-94361A366 1/2"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 140,000 psi, this screw reliably handles high-stress applications, reducing the risk of mechanical failure in demanding environments.
• Precision Positioning & Alignment: The 5/8" shoulder diameter with tight tolerances ensures exact component placement, minimizing misalignment and improving assembly accuracy.
• Superior Thread Engagement: Class 3A UNF fine threads provide a secure, vibration-resistant fit, enhancing joint integrity in dynamic machinery operations.
• Enhanced Durability & Corrosion Resistance: The black oxide finish on alloy steel offers protection against rust and wear, extending service life in industrial settings.
• Secure & Easy Installation: A knurled socket head with 5/16" hex drive allows for firm grip and efficient torque application, speeding up assembly while preventing tool slippage.
• High Hardness for Longevity: Rockwell C32 hardness ensures the screw maintains its shape and thread profile under repeated use, reducing replacement frequency.
• Compliance with Environmental Standards: RoHS 3 and REACH compliance guarantees safe use in regulated industries, supporting sustainable manufacturing practices.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical challenges in precision machinery and industrial assemblies, where exact alignment and high strength are paramount. The alloy steel construction, combined with a black oxide finish, provides robust resistance to corrosion and mechanical stress, making it ideal for applications in automotive, aerospace, and heavy equipment. The 5/8" shoulder diameter with tight tolerances ensures precise component positioning, eliminating play and reducing wear in rotating parts like bearings and pulleys. Class 3A UNF fine threads deliver superior clamping force and vibration resistance, crucial for maintaining integrity in high-speed operations. By integrating these features, this screw minimizes downtime and enhances reliability in precision positioning systems, supporting efficient B2B procurement for maintenance and production lines.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit and UNF standard for precise dimensional accuracy, with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) for substance safety, ensuring environmental and regulatory conformity in industrial use.