Blue Sea Systems Panel Mount AGC/MDL Fuse Holder Replacement Cap, For 5021

Overview

The Blue Sea Systems 5022 is a replacement cap for the Blue Sea Systems 5021 panel mount AGC/MDL fuse holder. It is the service part used when the original cap is missing, cracked, or no longer closes the holder properly, and it fits the 5021 holder used with AGC or MDL glass fuses in circuits up to 32V DC and 20A.

On a boat, a small part like this matters because the fuse holder still needs to close securely at the panel face for routine fuse checks and replacement. This cap is a straightforward way to bring a compatible 5021 holder back into normal use without changing the whole holder assembly.

It is a good match for owners, installers, and service techs maintaining existing Blue Sea panel installations, especially where the fuse holder body is still in good condition and only the cap needs to be replaced.

Key features

• Direct replacement cap for the Blue Sea Systems 5021 panel mount AGC/MDL fuse holder
• Made for holders used with AGC or MDL glass fuses in 32V DC circuits up to 20A
• Restores normal closure and fuse access when the original cap has been lost or damaged
• Useful for panel service work where replacing the entire fuse holder is unnecessary
• Fits the 5021 holder used on panel installations, including Contura waterproof fuse panels

Compatibility and fit

This cap is not a general replacement for every AGC/MDL fuse holder. It is the matching cap for Blue Sea Systems 5021, so the key fit check is the holder itself, not just the fuse style. If your boat already has a 5021 panel mount holder in place, this is the correct service cap for that assembly.

Because it relates to a panel mount holder, it makes sense anywhere the front of the panel needs to stay tidy and the fuse still needs to be accessible for inspection or replacement during troubleshooting.

Installation and use

Replacement is simple when the holder body is intact. Remove the damaged or missing cap, confirm the fuse holder body is the 5021 style, check the fuse condition, and thread the new cap into place so the holder can be closed and used normally again.

This is the sensible repair when the holder still works electrically and the issue is limited to the cap. If the body, contacts, or mounting area are also damaged, the full holder should be inspected before the circuit is put back into service.