S-91054A492 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced wear resistance and extended service life due to the durable TiCN coating.
• High-strength performance with a 70,000 psi tensile strength for demanding applications.
• Precise component alignment ensured by the accurately machined shoulder with a tight diameter tolerance.
• Reliable and secure fastening provided by the Class 2A UNC coarse thread for easy assembly.
• Efficient installation and removal with the standard hex socket drive, requiring minimal clearance.
• Compliance with global environmental standards including RoHS 3 and REACH for safe use.

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to solve critical alignment and durability challenges in industrial fastening. The 18-8 stainless steel core provides excellent resistance to rust and corrosion, while the advanced TiCN coating significantly reduces friction and wear, making it perfect for high-cycle machinery and moving assemblies. The precise shoulder fit acts as a pivot or axle, ensuring components like gears, pulleys, and linkages maintain exact positioning without misalignment. This combination of material strength, surface finish, and dimensional accuracy delivers long-term reliability, reducing maintenance downtime and component failure in automation, automotive, and precision equipment applications.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with a Class 2A fit for standard tolerance, a 5/16" shoulder diameter with a tight tolerance of -0.002" to 0", and a shoulder length of 1/8" (tolerance 0" to 0.003"). It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55 and a tensile strength of 70,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.