MistKing 3/8" Metal Bulkhead O-Ring & Plug – Misting Spare

A replacement O-ring and plug set for MK 3/8" metal bulkheads, designed to keep your vivarium or terrarium misting system sealed and leak-free. Essential to have on hand if you run a misting setup where a failed seal or missing plug can disrupt humidity control or cause water ingress around the enclosure.

What's Included

This pack contains the O-ring and blanking plug specific to the MK 3/8" metal bulkhead fitting. The O-ring maintains a watertight seal at the bulkhead joint, while the plug allows you to blank off an unused bulkhead port cleanly without removing the fitting itself.

When You Need This

• Replacing a worn or perished O-ring that is causing drips or seepage at the bulkhead
• Blanking off a spare bulkhead outlet on a reservoir, vivarium panel, or distribution manifold
• Restocking consumable spares so a seal failure doesn't take your misting system offline

Compatibility

Sized specifically for MK 3/8" metal bulkhead fittings. If you are running MK misting components throughout your setup, this is the correct replacement part — do not substitute with generic O-rings, as an incorrect size will not seal reliably under system pressure.

Keeping a spare set means a worn seal is a two-minute fix rather than a problem that leaves your reptiles without humidity overnight.