S-90337A335 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring longevity in harsh environments
• Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty industrial applications
• Precise alignment and secure fit enabled by the 3/8" shoulder diameter with precise fit and Class 2A thread fit, reducing assembly errors
• Easy installation in confined spaces with low-profile socket head and 3/16" hex drive for efficient torque application
• Reliable thread engagement from UNC coarse threads and 7/16" thread length, providing strong holding power
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use
• Consistent dimensional accuracy with tight shoulder diameter and length tolerances for repeatable performance in precision assemblies

Professional Applications & Engineering Value

This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in moist or chemical environments, extending service life in machinery, automotive, and electronics. The 3/8" shoulder diameter provides a precise pivot or bearing surface, minimizing wear and misalignment in rotating assemblies. With a low-profile socket head and hex drive, it allows for easy installation in tight spaces while maintaining high tensile strength of 70,000 psi. Ideal for applications requiring reliable thread fit and dimensional stability, this screw ensures reduced downtime and enhanced operational efficiency.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with Class 2A thread fit for consistent engagement. Dimensions include a thread size of 1/4"-20, shoulder diameter of 3/8" (tolerance: -0.001" to 0"), and shoulder length of 5/16" (tolerance: 0" to 0.002"), ensuring precise manufacturing. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in global markets.