S-91829A206 8-32 MS51575-12, NASM51575 Shoulder Screws

Key Features & Benefits at a Glance

• Superior Corrosion Resistance: Crafted from 18-8 Stainless Steel with a passivated finish for enhanced durability in harsh environments.
• High Tensile Strength & Hardness: Withstands up to 70,000 psi tensile load and Rockwell B55 hardness for reliable performance under stress.
• Precision Shoulder Fit: Features a precisely machined 5/8" shoulder with tight tolerances for accurate alignment and reduced component wear.
• Wide Industrial Compatibility: UNC coarse thread with Class 2A fit ensures easy installation and secure fastening in various assemblies.
• Socket Head Design: Combines socket and slotted drive for versatile tool access and high torque application without slippage.
• Regulatory Compliance: Meets MS51575-12 (NASM51575) specifications and is RoHS 3 & REACH compliant for safe, global use.
• Dimensional Consistency: Inch-system measurements with controlled shoulder diameter and length tolerances guarantee repeatable assembly quality.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Shoulder Screw is engineered to address critical alignment and wear issues in precision machinery. The 5/8" shoulder length with precise fit tolerance provides a stable pivot or bearing surface, minimizing misalignment in rotating assemblies like motors, linkages, and conveyor systems. The UNC coarse thread and Class 2A fit facilitate quick installation while maintaining secure fastening, reducing assembly time in high-volume production. The passivated finish on the stainless steel material offers excellent resistance to oxidation and chemical exposure, extending service life in demanding industrial environments such as automotive, aerospace, and packaging equipment. Its 70,000 psi tensile strength ensures it can handle dynamic loads without failure, making it a reliable choice for applications where vibration and stress are common.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC coarse thread standards with an 8-32 thread size. Manufacturing conforms to MS51575-12 (NASM51575) specifications, ensuring dimensional accuracy for the 5/8" shoulder length and 3/16" shoulder diameter with defined tolerances. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing it is free of hazardous substances for safe use in various markets.