S-91829A501 3/8"-16 MS51575-29, NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• Precise alignment and reduced wear due to the 1/2" shoulder diameter with tight tolerance (-0.001" to 0"), providing stable component positioning.
• High load-bearing capacity with 70,000 psi tensile strength and Rockwell B55 hardness, ideal for heavy-duty industrial applications.
• Easy installation and removal featuring a socket head with slotted drive for secure tool engagement and efficient assembly.
• Consistent thread performance with UNC coarse threads and Class 2A fit, ensuring reliable fastening in high-vibration settings.
• Compliance with strict standards including MS51575-29, RoHS 3, and REACH, guaranteeing safety and environmental responsibility.
• Durable and smooth operation from the right-hand thread design and smooth head texture, minimizing friction and damage during use.

Professional Applications & Engineering Value

This 3/8"-16 UNC shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component slippage. The 18-8 stainless steel material, combined with a passivated finish, offers excellent resistance to corrosion and oxidation, making it suitable for demanding environments like automotive assemblies, aerospace systems, and industrial equipment. The 1/2" shoulder diameter with precise tolerances ensures accurate alignment of parts, reducing wear and extending service life. Its coarse thread and Class 2A thread fit provide secure fastening in high-vibration applications, while the socket head design allows for easy installation in confined spaces. Ideal for use in pivots, axles, and rotating mechanisms, this screw delivers reliable performance and minimizes maintenance needs, supporting efficient B2B operations.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC standards for dimensional accuracy, with a shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002". It meets MS51575-29 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory adherence for industrial use.