Value Collection MS16997-78 Hex Socket Cap Screw 5/16-18

Product Description

The VALUE COLLECTION MS16997-78 is a hex socket cap screw designed for secure, high-strength fastening in mechanical and structural assemblies. It features a 5/16-18 UNC thread and measures 3/4 inches in length under the head, with full threading along the entire shank. Driven by a 1/4-inch hex key, it seats flush and tight in counterbored holes. Manufactured from 4037 alloy steel with a yellow cadmium-plated finish, this screw delivers solid mechanical strength along with corrosion resistance suitable for demanding service environments. It conforms to ASME B18.3 fastener standards.

This screw is suited for use in industrial machinery, tooling fixtures, equipment panels, and general mechanical assemblies where a recessed drive head is required. The fully threaded shank provides maximum thread engagement across the full clamped length, making it a reliable choice in applications where vibration resistance and consistent clamp load are priorities. Maintenance technicians, machinists, and mechanical assemblers commonly install this type of fastener across a wide range of light to medium-duty applications.

Key Features

• 5/16-18 UNC thread for broad compatibility with standard tapped holes
• 3/4-inch length under head with full threading along the entire shank
• 1/4-inch hex socket drive for precise torque application using a hex key or Allen driver
• 4037 alloy steel construction for enhanced tensile and shear strength
• Yellow cadmium-plated finish provides corrosion and oxidation resistance
• Conforms to ASME B18.3 fastener standard

Compatibility

Designed as an OEM-style replacement or maintenance fastener for mechanical assemblies requiring a 5/16-18 UNC hex socket cap screw per ASME B18.3.

Installation Notes

Install using a calibrated torque wrench with a 1/4-inch hex bit to reach the manufacturer-specified torque for the mating assembly. Ensure the tapped hole is clean and free of debris before threading. De-energize and lock out any equipment before replacing fasteners in live assemblies. Cadmium-plated fasteners should be handled in accordance with applicable safety guidelines due to the hazardous nature of cadmium compounds.