S-91829A537 10-32 MS51575-21, NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh environments.
• Precise alignment and reduced wear due to the Class 2A thread fit and precisely machined shoulder with minimal tolerances.
• High strength and durability offering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Secure and reliable fastening with a 10-32 UNF fine thread and right-hand direction, ensuring vibration resistance.
• Easy installation and removal featuring a standard socket head for efficient torque application.
• Compliance with strict industry standards including MS51575, RoHS 3, and REACH, ensuring safety and regulatory adherence.
• Versatile use in precision assemblies with a 1/4" shoulder length providing accurate component spacing and pivot points.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to solve critical alignment and durability challenges in industrial settings. The 18-8 stainless steel material combined with a passivated finish provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive, and electronics applications exposed to moisture or chemicals. The 10-32 UNF fine thread and Class 2A fit ensure tight, reliable fastening that minimizes loosening under vibration, while the precisely toleranced shoulder (diameter: 1/4", length: 1/4") allows for exact component positioning in assemblies like bearings, linkages, and pivots. This design reduces wear, improves operational accuracy, and extends equipment life, delivering consistent performance in high-stress environments.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNF thread standards with a 10-32 size, ensuring dimensional accuracy and interchangeability. The shoulder features precise tolerances (diameter: -0.001" to 0", length: 0" to 0.002") for reliable performance. It meets MS51575 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free from hazardous substances and suitable for global industrial use.