S-97768A422 3/8"-24 ASME B18.3 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Precise alignment and reduced wear due to Class 3A thread fit and UNF fine threading, ensuring reliable performance in repetitive assemblies
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding mechanical applications
- Enhanced grip and tool engagement from the knurled socket head and 1/4" hex drive, preventing slippage during installation
- Accurate component positioning with a precisely machined shoulder featuring tight diameter and length tolerances
- Long-term durability supported by Rockwell B55 hardness, maintaining integrity under stress and vibration
- Global compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for safe, reliable use worldwide
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and strength challenges in industrial machinery, automation systems, and precision instruments. The 18-8 stainless steel material, enhanced with a black oxide finish, provides excellent resistance to corrosion and oxidation, extending service life in humid or chemically exposed settings. The Class 3A thread fit and UNF fine threading ensure secure fastening with minimal backlash, vital for high-vibration applications like robotics and conveyor systems. The knurled socket head allows for easy installation with standard hex tools, while the shoulder acts as a precise pivot or spacer, reducing wear on moving parts. Ideal for use in assembly jigs, bearing mounts, and linkages, this screw delivers consistent performance where tensile strength and dimensional accuracy are paramount.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit tolerances for superior precision, with UNF fine threading (3/8"-24) ensuring secure engagement. Manufacturing conforms to ASME B18.3 specifications, guaranteeing dimensional consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for international industrial use.
