5/16" Counterbore bung

Weld-On Counterbored Steel Bungs – For 5/16" Socket Head Cap Screws

Get a clean, flush-mounted finish with our precision-machined weld-on counterbored bungs – designed specifically to accept socket head cap screws (Allen bolts). Each bung is CNC machined from solid 3/4" diameter mild steel round bar for durability and strength.

The top is counterbored so that the 5/16" bolt head sits flush, offering a sleek, professional appearance ideal for custom fabrication, automotive builds, and industrial applications. These bungs are easy to weld and perfect for mounting applications where aesthetics and functionality matter.

Product Features:

Accepts 5/16" socket head cap screws (Allen bolts)

Made from solid mild steel

Counterbored top for flush bolt installation

Weld-on design – ideal for custom fab work

Available in multiple lengths and sizes

Made in the USA

Available Sizes & Pricing:

Other bolt sizes available – contact us for custom orders or bulk pricing!