S-91054A360 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional wear resistance and reduced friction thanks to the durable TiCN coating, extending service life
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing
• Precise alignment and location ensured by the smooth, accurately machined 3/8" shoulder with tight diameter tolerance
• Secure and reliable fastening with Class 2A UNC coarse threads, designed for easy assembly and vibration resistance
• Easy installation with standard tools via the hex socket drive, preventing cam-out and ensuring proper torque application
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe and responsible sourcing

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and rotational motion challenges in demanding assemblies. The 18-8 stainless steel base material provides excellent resistance to corrosion and oxidation, while the advanced TiCN coating significantly enhances surface hardness and reduces friction, making it ideal for high-wear applications like pivots, gears, and rotating machinery components. The 3/8" shoulder diameter with its precise tolerance acts as a reliable axle or dowel, maintaining exact positioning and preventing lateral movement. Combined with the UNC coarse threads and hex socket drive, it ensures quick, secure installation and long-term reliability in automotive, aerospace, and industrial equipment, reducing maintenance needs and downtime.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit for consistent, reliable engagement. The shoulder features a precise diameter tolerance of -0.002" to 0" and a length tolerance of 0" to 0.003" for accurate assembly. Manufactured to standard UNC thread specifications (5/16"-18) with a right-hand thread direction. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for global industrial use.