S-98637A538 1/4"-28 x 3/8" MS51964-66 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with precision Class 3A fine threads ensuring tight, secure fastening in demanding applications.
• Excellent corrosion resistance provided by cadmium plating, extending service life in harsh industrial environments.
• High strength and durability from alloy steel construction with Rockwell C45 hardness, resisting wear and deformation.
• Efficient torque transmission via the 1/8" hex drive, allowing for easy installation and removal with standard tools.
• Secure component positioning thanks to the cup point design, which digs into surfaces to prevent loosening under vibration.
• Reliable thread engagement with UNF fine threads and right-hand direction, offering precise adjustments and high clamping force.
• Industry compliance assurance by meeting MS51964-66 specifications, ensuring consistent quality and performance.

Professional Applications & Engineering Value

This 1/4-28 UNF Class 3A cup point set screw is engineered to address critical fastening challenges in machinery, automotive, and aerospace sectors. Made from cadmium-plated alloy steel, it combats corrosion and provides long-term reliability in exposed or high-stress conditions. The fine thread design and Class 3A fit deliver exceptional precision, minimizing backlash and ensuring stable connections in assemblies prone to vibration. Its headless and hex drive configuration allows for flush mounting and easy access in confined spaces, while the cup point securely bites into shafts or hubs, preventing rotational slip. Ideal for permanent or semi-permanent setups, this set screw enhances safety and reduces maintenance needs in industrial equipment.

Specification Summary & Compliance

This set screw adheres to UNF thread standards with a Class 3A thread fit for high precision and consistent performance. Dimensions include a 1/4"-28 thread size, 3/8" length, and 1/8" hex drive. It meets MS51964-66 specifications, ensuring compliance with industrial manufacturing norms. The cadmium plating offers environmental protection, and the material and processing align with common industry requirements for durability and safety.