S-91273A635 3/8"-16 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi min shear) ensures reliable performance under heavy loads and vibration.
• Precision shoulder design with tight diameter and length tolerances provides accurate alignment and smooth rotational movement in assemblies.
• Secure and easy installation using a standard 3/16" hex drive and knurled head for improved grip and torque application.
• Wide compatibility with UNC coarse threads and Class 2A fit for easy assembly and interchangeability in standard applications.
• Durable material hardness (Rockwell B55) offers excellent wear resistance and long service life in demanding mechanical systems.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global markets.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and rotational requirements in industrial machinery. The 2" precision shoulder with controlled tolerances acts as a reliable pivot or axle, reducing wear on mating components and maintaining precise positioning in assemblies like conveyor systems, robotic arms, and printing equipment. Made from 18-8 stainless steel with a black oxide finish, it provides enhanced corrosion resistance in humid or chemically exposed environments, minimizing maintenance downtime. The socket head with hex drive and knurled texture allows for secure tool engagement in confined spaces, ensuring efficient installation and disassembly. Ideal for applications demanding high strength and dimensional accuracy, this shoulder screw supports smooth operation and extends equipment lifespan in automotive, aerospace, and manufacturing sectors.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC coarse thread with Class 2A fit for standard assembly tolerances. The shoulder diameter is 3/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 2" with a tolerance of -0.005" to 0.005", ensuring precise dimensional control. Manufactured from 18-8 stainless steel, it meets a tensile strength of 70,000 psi and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications.