S-94035A511 4-40 MS51576-1, 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 thanks to 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments.
- Precise component alignment and spacing ensured by the smooth, 1/8" diameter shoulder with a precise fit tolerance.
- High-strength performance under load with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable, durable fastening.
- Secure, high-torque installation enabled by the internal hex socket drive, reducing the risk of tool slippage and head stripping.
- Wide compatibility and easy assembly with the standard 4-40 UNC coarse, right-hand thread and Class 2A fit for common applications.
- Strict compliance with industry standards including MS51576-1 (NASM51576), ensuring consistent quality and interchangeability.
- Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for safe use in regulated industries.
Professional Applications & Engineering Value
This 4-40 UNC Stainless Steel Shoulder Screw is engineered to solve critical alignment and pivot point challenges in precision assemblies. The 1/8" shoulder diameter provides an exact unthreaded bearing surface, preventing misalignment in machinery, electronic enclosures, and rotating assemblies. Made from 18-8 Stainless Steel with a passivated finish, it resists oxidation and chemical exposure, extending service life in demanding conditions. The hex socket drive allows for compact, high-torque installation in confined spaces, while the coarse UNC thread ensures rapid and secure engagement. Ideal for use in aerospace components, precision instruments, and automated equipment, this screw delivers reliable performance where dimensional accuracy and corrosion resistance are paramount.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent engagement and a shoulder diameter tolerance of -0.001" to 0". It is manufactured in compliance with MS51576-1 (NASM51576) specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both performance reliability and regulatory adherence for industrial and export applications.
