S-98637A542 1/4"-28 x 1/2" MS51964-68 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with a cup point design that bites into materials for secure, vibration-resistant fastening in demanding applications.
• Enhanced corrosion resistance from the cadmium plating, extending the screw's service life in harsh or outdoor industrial environments.
• High-strength durability provided by alloy steel with a Rockwell C45 hardness, ensuring the screw withstands high stress without deforming.
• Precise and reliable fit due to the Class 3A UNF fine thread, offering tighter tolerances for improved assembly accuracy and load distribution.
• Easy and secure installation with the 1/8" hex drive, allowing for high torque application and reducing the risk of tool slippage.
• Space-saving headless design ideal for applications where a flush surface is required, maximizing usable space.
• Guaranteed compliance with MS51964-68 specifications, ensuring consistent quality and performance for industrial use.

Professional Applications & Engineering Value

This 1/4"-28 UNF cup point set screw is engineered to solve critical challenges in industrial assembly and machinery. The cadmium-plated alloy steel construction provides excellent resistance to corrosion and wear, making it ideal for automotive, aerospace, and heavy equipment applications where exposure to elements is a concern. The fine UNF threads and Class 3A fit ensure minimal backlash and superior clamping force, preventing loosening under vibration—a common pain point in dynamic systems. The cup point design concentrates pressure for a firm grip on shafts and collars, while the hex drive allows for efficient installation in confined spaces. Meeting MS51964-68 standards, it delivers reliable performance in precision set screw applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with a Class 3A fit for high precision, a length of 1/2", and a 1/8" hex drive. Manufactured from cadmium-plated alloy steel with a hardness of Rockwell C45, it complies with MS51964-68 specifications. The product adheres to industry standards for dimensional accuracy and is suitable for applications requiring consistent thread engagement and durability.