S-97832A127 3/8"-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Enhanced load-bearing capacity from the 1/2" shoulder diameter, providing precise alignment and reduced wear in rotating assemblies.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness, ensuring durability under heavy mechanical stress.
• Precise thread engagement thanks to Class 3A thread fit and 3/8"-24 UNF fine threads, offering secure fastening and vibration resistance.
• Easy and secure installation with a knurled socket head and 1/4" hex drive, preventing tool slippage in tight spaces.
• Strict dimensional accuracy with controlled shoulder diameter and length tolerances, ensuring consistent fit in precision machinery.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence for global use.

Professional Applications & Engineering Value

This shoulder screw is engineered to address critical alignment and rotational demands in industrial machinery. The 18-8 Stainless Steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in automotive, aerospace, and food processing equipment where environmental factors are a concern. The 1/2" shoulder diameter acts as a precise pivot or bearing surface, reducing friction and wear in assemblies like linkages, gears, and pulleys. Combined with Class 3A thread fit and UNF fine threads, it ensures tight tolerances and reliable performance in high-vibration environments. The knurled socket head enhances grip during installation, minimizing the risk of damage in confined spaces. Ideal for precision shoulder bolts in heavy-duty fastening, this component delivers consistent engineering value by improving assembly accuracy and longevity.

Specification Summary & Compliance

This shoulder screw features a 3/8"-24 UNF fine thread with Class 3A thread fit for high precision, along with a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications for dimensional standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for international industrial applications.