S-90337A483 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 Stainless Steel construction with a passivated finish, ensuring long-term reliability in harsh environments.
• Precise component alignment and smooth rotation enabled by the accurate 3/8" diameter shoulder with a precise fit tolerance.
• High-strength performance under load with a tensile strength of 70,000 psi and Rockwell B55 hardness for demanding applications.
• Reliable and secure fastening achieved through the Class 2A thread fit for consistent engagement and vibration resistance.
• Easy installation in confined spaces with a low-profile socket head and 5/32" hex drive, requiring minimal clearance.
• Quick assembly with coarse UNC threads that allow for faster installation compared to fine-thread alternatives.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring suitability for regulated industries.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery. The 18-8 Stainless Steel material, combined with a passivated finish, provides excellent resistance to corrosion and wear, making it ideal for applications in manufacturing, automation, and outdoor equipment. The 3/4" shoulder length and precise diameter act as a dependable axle or guide for moving parts like gears, levers, and linkages, reducing wear and maintaining operational accuracy. The low-profile socket head with a hex drive allows for secure tightening in tight spaces, while the 5/16"-18 UNC coarse thread ensures robust holding power. This design is essential for assemblies requiring minimal backlash and high tensile strength, delivering long-term value in precision-driven environments.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit for standard clearance and reliable assembly, conforming to UNC thread standards. The shoulder diameter is held to a tight tolerance of -0.001" to 0", and the shoulder length tolerance is 0" to 0.002" for precise applications. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for use in regulated markets.