S-90337A334 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise alignment and smooth rotation due to the accurately machined shoulder with tight diameter and length tolerances
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
• Easy installation in confined spaces with the low-profile socket head and standard 3/16" hex drive
• Consistent thread engagement ensured by the Class 2A thread fit and coarse UNC thread pattern
• Compliance with global environmental standards, being RoHS 3 and REACH compliant for safe and sustainable use
• Durable, long-lasting finish that resists wear and maintains integrity under repeated use

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery and assemblies. The 1/4" shoulder length and precise diameter provide a stable bearing surface for gears, linkages, and rotating components, eliminating the need for additional bushings and reducing assembly complexity. Manufactured from 18-8 stainless steel with a passivated finish, it offers excellent resistance to corrosion and chemical exposure, making it suitable for food processing, packaging equipment, and outdoor machinery. The low-profile socket head and hex drive allow for secure tightening in tight spaces, while the Class 2A UNC threads ensure reliable fastening in high-vibration environments. This combination of features delivers reduced maintenance, extended service life, and improved operational reliability in demanding industrial fastener applications.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC thread with Class 2A fit for consistent threading and assembly. The shoulder is manufactured to precise tolerances, with a diameter of 3/8" (-0.001" to 0") and length of 1/4" (0" to 0.002"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and safe for various industrial and commercial uses.