S-91829A513 4-40 MS51575-2, NASM51575 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 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Precise component alignment ensured by the 1/8" shoulder diameter and 3/16" shoulder length with tight tolerances for reliable assembly.
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for durable, long-lasting fastening.
- Wide compatibility and easy installation with UNC coarse threads, Class 2A fit, and standard socket head for efficient tool engagement.
- Compliance with stringent standards including MS51575-2, RoHS 3, and REACH, ensuring safety and regulatory adherence.
- Resistance to loosening due to right-hand thread design and coarse spacing, maintaining secure connections under vibration.
- Smooth, consistent performance from the precise shoulder fit and smooth head texture, reducing wear in dynamic applications.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in demanding settings like machinery, electronics, and automotive systems. The 1/8" shoulder diameter and controlled length provide exact positioning for components, minimizing misalignment and wear. With a tensile strength of 70,000 psi and Rockwell B55 hardness, it withstands high stress and vibration, ensuring reliable performance in industrial shoulder screw applications. Its compliance with MS51575-2 and environmental standards makes it a trusted choice for engineers seeking robust, compliant fastening solutions.
Specification Summary & Compliance
This shoulder screw features a Class 2A thread fit with UNC coarse threads and precise shoulder dimensions (diameter tolerance: -0.001" to 0", length tolerance: 0" to 0.002"). It meets MS51575-2 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to industry and environmental regulations for safe, high-quality use.
