S-94361A369 1/2"-20 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.
• Precision Class 3A thread fit guarantees tight, secure connections with minimal backlash, enhancing assembly accuracy.
• Black oxide finish provides superior corrosion resistance, extending service life in demanding industrial environments.
• Knurled socket head with 5/16" hex drive offers improved grip and torque application, preventing tool slippage during installation.
• Alloy steel construction with Rockwell C32 hardness delivers excellent wear resistance and durability for long-term use.
• Standard shoulder diameter and length facilitate precise component alignment and rotational movement in machinery.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global manufacturing standards.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial equipment. The 1/2"-20 UNF fine thread with Class 3A fit provides superior clamping force and vibration resistance, ideal for precision assemblies in automotive, aerospace, and heavy machinery. The black oxide finish not only enhances corrosion protection but also reduces galling in high-friction applications. With a shoulder diameter of 5/8" and controlled tolerances, it ensures exact positioning of moving parts, minimizing wear and maintenance downtime. The knurled socket head allows for secure tool engagement in confined spaces, making it a reliable choice for industrial shoulder bolt applications requiring both strength and precision.

Specification Summary & Compliance

This shoulder screw features a 1/2"-20 UNF fine thread with Class 3A tolerance for high-precision fit, a shoulder diameter of 5/8" with tolerance of -0.004" to -0.002", and shoulder length of 3/4" with tolerance of -0.005" to 0.005". It is manufactured from alloy steel with Rockwell C32 hardness and 140,000 psi tensile strength. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards.