S-94128A177 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Durability: Alloy steel construction with Rockwell C32 hardness provides superior resistance to wear and deformation in high-stress environments.
• Precise Alignment: Class 3A thread fit and precise shoulder dimensions ensure accurate component positioning and reduced assembly vibration.
• Robust Fastening: Coarse 3/8"-16 UNC threads offer excellent grip and faster installation in demanding industrial applications.
• Space-Efficient Design: Headless, slotted drive style allows for compact assemblies and easy adjustment in confined spaces.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries and global market acceptance.
• Reliable Shoulder Performance: Tight tolerance shoulder diameter (1/2") and length (5/8") provide consistent bearing surfaces for rotating parts.
• Right-Hand Thread Convenience: Standard thread direction simplifies installation and compatibility with common machinery.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery. The alloy steel material, hardened to Rockwell C32, withstands repetitive loads and impacts in applications like rotating shafts, pivoting mechanisms, and precision guides. Its Class 3A UNC thread fit and exact shoulder dimensions prevent misalignment, reducing wear on components and minimizing maintenance downtime. The headless slotted drive design is ideal for compact assemblies where protruding heads are impractical, while the coarse thread ensures secure fastening even in vibrating environments. Fully compliant with RoHS and REACH, it is suitable for automotive, aerospace, and heavy equipment sectors requiring reliable, long-lasting performance.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Shoulder diameter is 1/2" with a tolerance of -0.001" to 0", and shoulder length is 5/8" with a tolerance of 0" to 0.005", ensuring consistent precise shoulder fit. It is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial use.