S-98637A103 4-40 x 1/8" MS51963-9 Set Screws
Set 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 cadmium plating, extending service life in harsh industrial environments.
- High-strength alloy steel construction with Rockwell C45 hardness ensures reliable, long-term holding power without deformation.
- Precise Class 3A thread fit guarantees tight, secure fastening with minimal backlash in critical assemblies.
- Compact headless hex drive design allows for easy installation in confined spaces using a standard 0.050" hex key.
- Cup tip configuration provides excellent grip and resistance to vibration, preventing loosening under dynamic loads.
- Compliance with MS51963-9 specifications ensures consistent quality and interchangeability for defense and aerospace applications.
- Coarse UNC threads enable quick assembly and disassembly, reducing maintenance time and labor costs.
Professional Applications & Engineering Value
This 4-40 UNC set screw is engineered to address common challenges in precision assemblies, such as shaft securing, gear positioning, and component alignment in machinery and electronics. The cadmium-plated alloy steel material offers excellent resistance to oxidation and wear, making it ideal for applications exposed to moisture or chemicals. Its headless hex drive and compact 1/8" length allow for seamless integration in space-constrained designs, while the Class 3A thread fit and coarse thread design ensure rapid, reliable fastening with high repeatability. By meeting MS51963-9 standards, this screw provides assurance for use in regulated industries like aerospace and defense, where failure is not an option.
Specification Summary & Compliance
This set screw adheres to UNC coarse thread standards with a Class 3A thread fit for precise dimensional accuracy. It is manufactured from alloy steel with a cadmium plating finish and complies with MS51963-9 specifications, ensuring reliability in demanding applications. The product meets common industry requirements for material and performance, though specific RoHS or REACH declarations should be verified per batch.
