S-92944A143 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 and extended service life.
• Exceptional mechanical strength offering a tensile strength of 70,000 psi and a shear strength of 35,000 psi for reliable performance in high-stress applications.
• Precise alignment and pivot function enabled by the 1/2" diameter shoulder with tight tolerances, reducing wear and ensuring smooth operation.
• Secure and durable fastening with a Class 3A thread fit on the 3/8"-16 UNC coarse threads, providing excellent vibration resistance.
• Easy installation and removal using the 5/16" hex drive and standard 82° countersink angle, compatible with common tools for efficient assembly.
• Consistent quality and reliability backed by a Rockwell B55 hardness, ensuring dimensional stability and resistance to deformation.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for use in regulated markets and eco-conscious projects.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in precision assembly and machinery design. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it ideal for applications in food processing, marine environments, and outdoor equipment. The 1/2" shoulder diameter acts as a precise locating dowel or pivot point, eliminating the need for additional bushings and reducing assembly complexity. Combined with the Class 3A thread fit and coarse UNC threads, it ensures a secure, vibration-resistant connection that maintains integrity under dynamic loads. The flat head with hex drive allows for a flush finish and easy torque application, streamlining maintenance and reducing downtime in industrial automation and heavy-duty machinery.

Specification Summary & Compliance

This shoulder screw features a 3/8"-16 UNC thread with a Class 3A fit for high precision. The shoulder has a diameter of 1/2" with a tolerance of -0.004" to -0.002" and a length of 1-1/4" with a tolerance of -0.005" to 0.005". It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B55, tensile strength of 70,000 psi, and minimum shear strength of 35,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.