S-97768A453 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
• Enhanced durability and wear resistance from the black oxide finish, reducing maintenance needs
• Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and smooth rotation ensured by the knurled head and Class 3A thread fit
• Easy installation and removal using standard 1/4" hex drive tools, saving assembly time
• Reliable performance in regulated industries with compliance to ASME B18.3, RoHS 3, and REACH standards
• Optimized for high-stress applications with Rockwell B55 hardness and coarse UNC threads for secure fastening

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 rust and corrosion, extending service life in humid or chemically aggressive settings. The black oxide finish not only enhances aesthetic appeal but also reduces friction and galling during repeated use. With a 1/2" shoulder diameter and 3-1/2" shoulder length, it ensures accurate component spacing and alignment, minimizing vibration and wear in assemblies like bearings, pulleys, and linkages. The coarse UNC threads and Class 3A thread fit deliver secure, vibration-resistant connections, while the hex drive design allows for efficient torque application in confined spaces, reducing installation errors and downtime.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for precise dimensional accuracy, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 manufacturing standards, ensuring consistent quality and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for global industrial and electronic applications without environmental or health concerns.