S-94128A178 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Durability: Made from high-strength alloy steel with Rockwell C32 hardness for superior wear resistance and longevity in demanding industrial environments.
• Precision Alignment: Features a precise shoulder fit with tight tolerances (shoulder diameter: -0.001" to 0", length: 0" to 0.005") to ensure accurate component positioning and reduced vibration.
• Reliable Thread Performance: Class 3A thread fit with 3/8"-16 UNC coarse thread provides secure, vibration-resistant fastening and easier assembly in high-stress applications.
• Space-Saving Design: Headless, slotted drive configuration allows for compact installations and easy adjustment in confined machinery spaces.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring environmental safety and suitability for global industrial supply chains.
• Optimized for Heavy-Duty Use: Coarse threading and right-hand direction enable quick installation and high load-bearing capacity in mechanical assemblies.
• Versatile Shoulder Dimensions: 1/2" shoulder diameter and 3/4" shoulder length support precise pivoting, spacing, or rotational functions in engineered systems.

Professional Applications & Engineering Value

This alloy steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The Class 3A thread fit and UNC coarse thread ensure minimal backlash and reliable performance under dynamic loads, making it ideal for applications like precision gears, pivoting arms, and conveyor systems. The headless, slotted drive design facilitates flush mounting in compact assemblies, while the hardened Rockwell C32 material resists deformation in high-cycle operations. With a precise shoulder diameter and length, it provides stable bearing surfaces for rotating components, reducing wear and maintenance costs. Compliant with RoHS 3 and REACH, this screw meets stringent safety regulations, offering engineers a trusted solution for automotive, aerospace, and heavy equipment sectors.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Dimensions include a 3/8"-16 thread, 1/2" shoulder diameter (-0.001" to 0" tolerance), and 3/4" shoulder length (0" to 0.005" tolerance), ensuring exacting alignment. Manufactured from alloy steel with Rockwell C32 hardness, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental and industrial safety.