S-98637A410 1/4"-20 x 3/8" MS51963-65 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 holding power with Class 3A thread fit ensuring precise, vibration-resistant connections in demanding applications
- Exceptional corrosion resistance from cadmium plating, extending service life in harsh industrial environments
- High-strength durability with Rockwell C45 hardness alloy steel construction resisting deformation under heavy loads
- Secure installation through hex drive design allowing high torque application without head interference
- Positive locking action from cup point tip design that bites into mating surfaces preventing component slippage
- Reliable coarse threading with UNC 1/4"-20 specification enabling quick assembly and disassembly
- Standardized compliance meeting MS51963-65 specifications for consistent quality and interchangeability
Professional Applications & Engineering Value
Engineered for precision positioning and permanent component fixation, this 1/4-20 UNC set screw solves critical alignment challenges in power transmission systems, machinery assemblies, and precision equipment. The cadmium-plated alloy steel construction provides essential corrosion protection while maintaining Rockwell C45 hardness for repeated adjustment cycles without thread deformation. The headless hex drive design enables flush mounting in confined spaces, while the cup point creates permanent seating marks on shafts and collars, preventing rotational slippage under high torque conditions. These industrial set screws are particularly valuable in manufacturing equipment, automotive components, and aerospace assemblies where vibration resistance and precise dimensional control are paramount.
Specification Summary & Compliance
This inch system set screw features precision Class 3A thread fit with UNC coarse threading (1/4"-20) and right-hand direction. Manufactured to MS51963-65 specifications with consistent 1/8" hex drive and 3/8" length dimensions. The cadmium-plated alloy steel construction meets industry standards for mechanical properties and surface treatment, ensuring reliable performance in regulated industrial environments.
