S-91054A493 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 and galling resistance from TiCN coating, extending service life in high-friction applications.
• High tensile strength of 70,000 psi ensures reliable performance under significant mechanical loads.
• Precise shoulder fit and alignment with controlled shoulder diameter and length tolerances for accurate component positioning.
• Easy installation and removal with a standard 5/32" hex socket drive, reducing assembly time.
• Wide compatibility due to UNC coarse threading and Class 2A thread fit, suitable for various industrial assemblies.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and global market acceptance.

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel base material provides excellent resistance to rust and oxidation, while the TiCN coating significantly reduces wear, making it ideal for high-cycle machinery, pivoting mechanisms, and precision assemblies. The precise shoulder diameter and length ensure accurate locating of parts such as gears, pulleys, and linkages, minimizing misalignment and vibration. With a coarse thread design and Class 2A thread fit, it offers quick assembly and reliable holding power in demanding environments, from automotive jigs to conveyor systems.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 2A thread fit and a 3/8" thread length. The shoulder has a diameter of 5/16" with a tolerance of -0.002" to 0", and a length of 3/16" with a tolerance of 0" to 0.003" for precise fit. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring it is free from hazardous substances and suitable for global industrial use.