S-90337A464 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh industrial environments.
• High tensile strength of 70,000 PSI and Rockwell B55 hardness for superior load-bearing capacity and resistance to deformation under stress.
• Precise Class 2A thread fit with 1/4"-20 UNC coarse threads for quick, secure assembly and reduced risk of cross-threading in automated systems.
• Low-profile socket head design with 5/32" hex drive allows for compact installations and easy access in tight spaces without compromising torque application.
• Accurate shoulder dimensions (5/16" diameter, 1 1/4" length) with tight tolerances ensure consistent alignment and smooth rotation in pivoting or guiding applications.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets global standards for hazardous substance restrictions.
• Right-hand thread direction and coarse spacing facilitate faster installation and disassembly, improving maintenance efficiency in production lines.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in high-stress environments. Made from 18-8 stainless steel with a passivated finish, it resists corrosion and wear, making it ideal for automation systems, industrial machinery, and precision assemblies where consistent performance is essential. The low-profile socket head and UNC coarse threads enable secure fastening in confined spaces, while the precisely machined shoulder provides reliable bearing surfaces for rotating components. By combining 70,000 PSI tensile strength with tight dimensional tolerances, this screw minimizes play and vibration, reducing maintenance downtime and enhancing operational reliability in applications like robotics, conveyor systems, and fixture designs.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit standards with UNC coarse threads (1/4"-20) and features precise shoulder diameter (5/16") and length (1 1/4") tolerances for accurate assembly. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets international environmental and safety regulations, ensuring suitability for global supply chains and industrial applications requiring certified components.