4" Type DC Aluminum Cam & Groove Dust Cap

The Dixon 400-DC-AL is a Type DC dust cap sized for compatible 4" male cam and groove adapters. Its female connection fits over the adapter and uses the attached cam arms to retain the cap when the connection is temporarily out of service.

The cap should be matched to the correct nominal adapter size before installation. Proper sizing allows both cam arms to engage the adapter groove correctly and helps maintain a secure protective closure during storage, transport, or equipment downtime.

Dixon manufactures the 400-DC-AL from 356T6 aluminum for a durable cam and groove accessory with practical handling characteristics. The aluminum body provides a reusable protective closure for compatible systems where connections are routinely opened and closed.

Inspect the cap body, cam arms, pins, and connection surfaces before installation, especially where the cap is frequently removed and replaced. Damaged, bent, excessively worn, or contaminated components should be corrected or replaced before the cap is returned to service.

The 400-DC-AL is supplied with a nitrile rubber gasket positioned inside the female cap connection. The gasket contacts the mating adapter when the cam arms are closed and should remain properly seated and free from cuts, deformation, or excessive wear.

Dixon identifies other gasket types as available for applications requiring different material compatibility. Gasket selection should be based on the intended media, operating environment, and compatibility requirements rather than nominal connection size alone.

The Type DC cap is designed to close an otherwise exposed male cam and groove adapter when the connection is not being used. This helps protect the connection area from dirt, debris, and other external contamination between operating cycles.

The dust cap is a protective accessory and must not be treated as a pressure-retaining fitting. Dixon specifically states that dust caps and dust plugs are not to be used in pressure applications for safety and environmental reasons.