S-94128A176 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Thread Precision – Class 3A thread fit ensures tight, secure fastening with minimal backlash, ideal for high-vibration environments.
• Exceptional Material Strength – Made from alloy steel with Rockwell C32 hardness for excellent wear resistance and long-term durability.
• Accurate Shoulder Alignment – Precise 1/2" shoulder diameter and length tolerances provide stable locating and rotational support in assemblies.
• Space-Saving Headless Design – Headless slotted drive allows for flush mounting in confined spaces while enabling easy adjustment.
• Reliable Coarse Thread Performance – 3/8"-16 UNC coarse threads offer quick assembly and reduced cross-threading risk.
• Compliant with Global Standards – Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries.
• Optimized for Industrial Use – Right-hand thread and 5/8" thread length deliver consistent engagement in repetitive fastening tasks.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address common assembly challenges such as misalignment and component wear. The alloy steel construction, combined with Rockwell C32 hardness, ensures it withstands high-stress conditions in machinery, automation systems, and rotating equipment. The headless slotted drive design allows for a streamlined profile, making it suitable for compact mechanisms where protruding fasteners are not feasible. With its Class 3A thread fit and exact shoulder diameter and length tolerances, this screw provides reliable positioning and reduces the need for additional bushings or spacers. It is commonly used in precision jigs, conveyor systems, and motor mounts, where coarse UNC threads facilitate quick maintenance and disassembly.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. The shoulder diameter is maintained at 1/2" with a tolerance of -0.001" to 0", and the shoulder length is 1/2" with a tolerance of 0" to 0.005". It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial applications.