S-90337A476 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability and Corrosion Resistance: TiCN coating on 18-8 stainless steel provides superior wear resistance and long-term reliability in harsh industrial environments.
• Precise Shoulder Fit for Accurate Alignment: Smooth, precisely machined shoulder with minimal diameter tolerance ensures stable component positioning and reduces assembly errors.
• High Tensile Strength for Demanding Applications: Rated at 70,000 psi tensile strength and Rockwell B55 hardness, offering robust performance under heavy loads.
• Low Profile Socket Head Design for Space-Saving Installation: Hex drive (5/32") allows easy access in confined spaces while maintaining a sleek, low-profile appearance.
• Reliable Thread Engagement with Coarse UNC Threads: 1/4"-20 UNC coarse threads with Class 2A fit ensure quick, secure fastening and reduced cross-threading risks.
• Compliance with Global Environmental Standards: Meets RoHS 3 and REACH regulations, ensuring safe, eco-friendly use in various industrial sectors.
• Optimized Shoulder Length for Versatile Mounting: 7/16" shoulder length provides consistent support for pivots, bearings, and rotating assemblies.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 stainless steel construction, combined with a TiCN coating, significantly enhances corrosion and abrasion resistance, making it ideal for machinery, automotive, and electronics applications where exposure to moisture, chemicals, or frequent movement is common. The low profile socket head and hex drive facilitate easy installation in tight spaces, while the precise shoulder fit minimizes play and ensures accurate component positioning. With a 1/4-20 UNC coarse thread and Class 2A thread fit, it offers reliable, quick assembly, reducing downtime in production lines. These features make it a top choice for industrial fasteners in pivoting mechanisms, bearing retainers, and precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit tolerances for consistent engagement and features a UNC coarse thread (1/4"-20) with a shoulder diameter of 5/16" and length of 7/16". Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental safety and regulatory conformity for global industrial use.