S-90337A457 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for longevity in harsh industrial environments
• Precise component alignment ensured by the 5/16" shoulder diameter with tight tolerance (-0.001" to 0") for reduced vibration and wear
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
• Space-saving low-profile design with socket head and hex drive for easy installation in confined spaces
• Consistent thread engagement with Class 2A fit and coarse UNC 1/4"-20 threads for quick assembly and disassembly
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use across global markets
• Durable shoulder construction with 3/8" length and precise tolerance (0" to 0.002") for stable rotational movement

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical alignment challenges in mechanical assemblies. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to oxidation and chemical exposure, making it ideal for machinery, automotive, and electronic enclosures operating in demanding conditions. The 5/16" shoulder diameter with precise tolerance ensures minimal radial play, reducing wear on moving parts like gears, pulleys, and linkages. Its low-profile socket head and hex drive allow for secure tightening in confined spaces, while the Class 2A thread fit guarantees consistent fastening without cross-threading. These features make it a reliable choice for precision mounting, pivoting mechanisms, and alignment fixtures where dimensional stability is paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC 1/4"-20 coarse thread standards with Class 2A thread fit for reliable engagement. The shoulder maintains a diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002" for precise assembly. Manufactured from 18-8 stainless steel with a passivated finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, ensuring environmental safety and suitability for industrial applications worldwide.