S-93691A410 1/4"-20 MS51576-28, NASM51576 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with passivated 18-8 stainless steel, ideal for harsh industrial environments and extended service life.
- Precise alignment and reduced wear thanks to the 5/16" shoulder diameter with tight tolerance (-0.001" to 0") for stable component positioning.
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
- Reliable and secure fastening with Class 2A UNC coarse threads and right-hand direction, ensuring easy assembly and vibration resistance.
- Efficient installation and removal using a standard hex drive (5/32"), providing a secure grip and reducing tool slippage.
- Durable, smooth head design with a standard socket profile, minimizing friction and damage to adjacent components.
- Compliance with stringent standards including MS51576-28, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4-20 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The precisely machined 5/16" shoulder diameter and 3/4" shoulder length ensure accurate positioning of moving parts, reducing misalignment and wear in pivots, gears, and linkages. With a coarse thread and Class 2A fit, it offers quick assembly and reliable performance under high-stress conditions, enhancing operational efficiency and minimizing maintenance downtime for B2B users.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNC standards for consistent dimensional accuracy. It meets MS51576-28 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory conformity. The shoulder features precise tolerances (diameter: -0.001" to 0"; length: 0" to 0.002") for reliable performance in precision engineering applications.
