Value Collection 199726 Hex Socket Cap Screw 5/16-18 Unc

Product Description

The VALUE COLLECTION 199726 is a partially threaded hex socket cap screw designed for fastening applications that require a recessed drive and reliable clamping force. The screw features a 5/16-18 UNC thread and a 3-inch length under head, making it suitable for medium-depth fastening in structural and mechanical assemblies. The 1/4-inch internal hex drive accepts a standard hex key or Allen wrench. Constructed from 18-8 stainless steel, this fastener resists corrosion in wet, humid, or mildly corrosive environments. Machinists, millwrights, and general maintenance professionals use this style of cap screw across a wide range of industrial and commercial applications.

This cap screw is used in mechanical assemblies, equipment mounting, and fixture construction where a flush or recessed drive is preferred over an external hex head. The partial threading provides a smooth shank section that can act as a locating feature or bear shear loads in close-tolerance bores. Typical installation environments include manufacturing equipment, HVAC equipment frames, pump housings, and general industrial machinery. It is sold in a package quantity of one.

Key Features

• 5/16-18 UNC thread for compatibility with standard unified coarse-thread tapped holes
• 3-inch length under head accommodates medium-depth fastening applications
• Partial threading provides a smooth shank for shear-bearing and close-tolerance fit
• 1/4-inch internal hex drive for use with standard hex keys or socket drivers
• 18-8 stainless steel construction for corrosion resistance in wet or humid environments

Compatibility

Designed as a standard replacement or stock fastener for any application requiring a 5/16-18 UNC partially threaded socket head cap screw with a 3-inch length under head.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a 1/4-inch hex key or socket driver. Always ensure the mating tapped hole is clean and free of debris before driving the fastener. De-energize and lock out any equipment before replacing fasteners on or near moving components. Avoid over-torquing stainless steel fasteners, as 18-8 material is susceptible to galling; use an appropriate anti-seize compound when driving into stainless or aluminum threads.