S-91273A638 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced durability and wear resistance from the black oxide finish, extending service life.
• Precise alignment and secure pivoting enabled by the 2 3/4" shoulder with standard fit for consistent performance.
• High-strength fastening with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
• Easy installation and removal using the knurled socket hex head, providing excellent grip and torque transmission.
• Reliable thread engagement with 3/8"-16 UNC coarse threads and Class 2A fit, ensuring smooth assembly.
• Compliance with environmental standards including RoHS 3 and REACH, supporting sustainable manufacturing practices.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical challenges in machinery assembly, automation systems, and precision equipment. The black oxide finish not only provides an additional layer of corrosion protection but also reduces galling and friction during operation. Its 2 3/4" shoulder length and standard shoulder fit ensure accurate component alignment, minimizing misalignment and wear in rotating or sliding mechanisms. The 3/8"-16 UNC coarse thread with Class 2A fit offers quick and secure fastening, reducing assembly time while maintaining high tensile strength up to 70,000 psi. Ideal for use in conveyor systems, robotic arms, and industrial jigs, this socket head shoulder screw delivers long-lasting performance under heavy loads and repetitive motion.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with Class 2A fit for standard tolerance, a shoulder diameter of 3/8" with tolerance from -0.004" to -0.002", and a shoulder length of 2 3/4" with tolerance from -0.005" to 0.005". It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met.