Value Collection 581526PR Hex Socket Cap Screw 7/16-20 Unf

Product Description

The VALUE COLLECTION 581526PR is a hex socket cap screw engineered for precision fastening applications in mechanical assemblies, tooling fixtures, and structural connections. This fastener features a 7/16-20 UNF thread size, a 2.5-inch length under head, and a 3/8-inch hex drive socket. The screw is manufactured from alloy steel and finished with a black oxide coating, which provides moderate corrosion resistance and reduces light reflection on the fastener surface. It is partially threaded, which is typical for fasteners that must clamp two components together without thread engagement through the full grip length. Machinists, millwrights, and maintenance technicians are the primary installers of this type of fastener.

This cap screw is suited for use in industrial machinery, precision equipment mounts, jig and fixture construction, and general mechanical assembly where a fine-thread, high-strength alloy steel fastener is required. The 7/16-20 UNF fine thread pitch provides tighter engagement per turn compared to coarse thread, making it well-suited for applications where vibration resistance and precise torque control matter. It is appropriate for both shop floor maintenance and OEM assembly environments.

Key Features

• 7/16-20 UNF fine thread for vibration-resistant clamping and precise preload control
• 2.5-inch length under head with partial threading for full-shank grip in clearance holes
• Alloy steel construction meets ASME/ANSI B18.3 and ASTM A574 standards for high-strength socket head cap screws
• Black oxide finish reduces surface corrosion in low-moisture environments and minimizes glare
• 3/8-inch hex socket drive compatible with standard hex keys and socket drive tools

Compatibility

Designed as a standard ASME/ANSI B18.3 and ASTM A574 hex socket cap screw suitable for any application requiring a 7/16-20 UNF partially threaded fastener with a 3/8-inch hex drive.

Installation Notes

Installation requires a 3/8-inch hex key or socket driver. Verify that the mating tapped hole or nut meets the 7/16-20 UNF thread specification before installation. Clean threads and apply thread lubricant or thread-locking compound as required by the assembly specification. Do not exceed the rated torque for the alloy steel grade; refer to your fastener torque specification chart for the applicable clamp load target.