S-94128A147 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional Thread Precision: Class 3A fit ensures tight, secure fastening with minimal backlash, reducing assembly time and improving joint reliability in high-vibration environments.
• Superior Material Strength: Alloy steel construction with Rockwell C32 hardness provides excellent resistance to wear and deformation, extending service life under heavy loads.
• Accurate Shoulder Alignment: Precise shoulder diameter and length with tight tolerances guarantee consistent component positioning, eliminating misalignment issues in rotating assemblies.
• Simplified Installation & Maintenance: Headless slotted drive design allows easy access in confined spaces, while right-hand UNC coarse threads enable quick disassembly for maintenance.
• Rigorous Compliance Assurance: RoHS 3 and REACH compliance eliminates hazardous substances, ensuring safe use in regulated industries like electronics and automotive manufacturing.
• Optimized for Demanding Applications: Coarse thread profile and 0.164" thread diameter enhance grip strength in softer materials, preventing stripping in repetitive industrial use.

Professional Applications & Engineering Value

These 8-32 UNC shoulder screws deliver critical engineering solutions where precise alignment and rotational stability are paramount. The alloy steel composition, hardened to Rockwell C32, withstands shear forces in machinery pivots, conveyor systems, and robotic arms, preventing premature failure. The headless slotted drive facilitates flush mounting in tight spaces, while the Class 3A thread fit and controlled shoulder dimensions (3/16" diameter, 1/8" length) ensure zero play in bushings, bearings, and linkages. This eliminates rework in precision assemblies, reducing downtime in automotive, aerospace, and industrial equipment manufacturing. The coarse UNC threads provide rapid installation without cross-threading, ideal for high-volume production lines.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for superior accuracy. Critical dimensions include a thread diameter of 0.164", shoulder diameter of 3/16" (-0.001" to 0" tolerance), and shoulder length of 1/8" (0" to 0.005" tolerance) for precise shoulder fit. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety requirements for industrial fasteners.