S-94128A169 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Alignment Accuracy with a precisely machined 3/8" shoulder diameter and 1/2" shoulder length, ensuring components are held in exact position without shifting.
• Exceptional Thread Reliability due to Class 3A thread fit, providing tighter tolerances and reduced risk of cross-threading in high-vibration applications.
• Enhanced Durability from Alloy Steel construction and Rockwell C32 hardness, offering excellent resistance to wear and deformation under heavy loads.
• Broad Industrial Compatibility with 5/16"-18 UNC coarse threads, facilitating quick assembly and disassembly in machinery and equipment.
• Secure and Simple Installation using a slotted drive design, allowing for easy manual or tool-driven fastening without the need for specialized equipment.
• Environmental and Regulatory Safety through compliance with RoHS 3 and REACH standards, ensuring safe use in various industries without hazardous substances.
• Optimized for High-Stress Applications with a headless, right-hand thread design that minimizes protrusion and maximizes space efficiency in compact assemblies.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and stability challenges in industrial settings. Made from alloy steel and hardened to Rockwell C32, it withstands repetitive stress and high torque, preventing failures in machinery, automation systems, and precision instruments. The Class 3A thread fit and UNC coarse threads ensure secure fastening with minimal backlash, ideal for applications like rotating shafts, bearing mounts, and linkage assemblies where exact positioning is paramount. Its headless slotted drive allows for flush mounting, reducing obstruction and simplifying maintenance in confined spaces. By combining robust materials with exacting shoulder dimensions, this screw delivers reliable performance in demanding environments, from manufacturing equipment to aerospace components.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Shoulder dimensions include a diameter of 3/8" (tolerance: -0.001" to 0") and length of 1/2" (tolerance: 0" to 0.005"), ensuring consistent alignment. It is manufactured from alloy steel with a hardness of Rockwell C32 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial use.