4" Type DP Aluminum Cam & Groove Dust Plug

The Dixon 400-DP-AL is a Type DP dust plug sized for compatible 4" female cam and groove couplers. Its male plug profile fits into the coupler opening and provides a removable closure when the connection is temporarily disconnected.

The plug should be matched to the correct nominal coupler size before installation. Proper sizing allows the mating cam arms to engage the plug correctly and helps maintain a secure protective closure during non-pressure storage or handling.

Dixon manufactures the 400-DP-AL from 356T6 aluminum for a durable cam and groove accessory with manageable handling characteristics. The material matches Dixon's standard aluminum Type DP dust plug range across multiple nominal connection sizes.

Inspect the aluminum body and engagement surfaces before each installation, especially where plugs are repeatedly removed and replaced. Dents, deformation, heavy wear, or contamination can interfere with proper engagement in the mating female coupler.

The Type DP plug is intended to close an otherwise open female cam and groove connection when the system is disconnected. This helps protect the connection area from dirt, debris, and other external contamination during storage, transport, or periods between connections.

The plug is a protective accessory rather than a pressure-retaining system component. Dixon specifically states that dust caps and dust plugs must not be used in pressure applications for safety and environmental reasons.

Dixon produces the 400-DP-AL to interchange with products manufactured to Commercial Item Description A-A-59326D. The plug is designed to work with a compatible female cam and groove coupler of the corresponding 4" nominal size.

Inspect the mating coupler, cam arms, pins, gasket area, and plug surface before securing the closure. Both cam arms should engage correctly around the plug without forcing damaged or incompatible components together.