S-97768A433 3/8"-16 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and reduced wear thanks to the 1/2" shoulder diameter with tight tolerances for stable component positioning
• Enhanced durability and wear resistance from the black oxide finish and Rockwell B55 hardness
• Reliable, vibration-resistant fastening with Class 3A thread fit and UNC coarse threads for secure assembly
• Easy installation and removal using the knurled hex socket head for improved grip and torque application
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality and environmental safety

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, extending service life in humid or chemically aggressive settings. The 1/2" shoulder diameter with controlled tolerances ensures accurate alignment of moving parts, reducing misalignment and wear in assemblies like bearings, pulleys, and linkages. Combined with the black oxide finish, it offers added protection against galling and friction. The Class 3A thread fit and coarse UNC threads deliver secure, vibration-resistant connections, making it ideal for high-stress applications where reliability is paramount. This shoulder screw simplifies maintenance and enhances performance in industrial automation, automotive, and aerospace components.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC coarse thread with Class 3A thread fit for precise engagement. The shoulder diameter is 1/2" with a tolerance of -0.004" to -0.002", and shoulder length is 1 1/2" with a tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.