Pack of 6 North Mountain Supply #5.5 drilled rubber stoppers designed for smaller mouth jugs and fermenters. Made from BPA free food grade material, these slip resistant bungs are drilled to fit standard fermentation airlocks and help create an airtight seal for proper fermentation.
North Mountain Supply #5.5 drilled rubber stoppers are a practical solution for sealing smaller mouth jugs and fermenters during active fermentation. This set includes 6 matching stoppers, each pre-drilled to fit standard size fermentation airlocks, making them ideal for homebrewing, winemaking, cider, and other small batch projects.
These stoppers are designed to:
Fit standard airlocks securely
Create an airtight seal in smaller mouth glass jugs and similar vessels
Help maintain proper fermentation conditions by allowing CO2 to escape through the airlock while limiting outside air exposure
The slip resistant design helps the stopper stay firmly in place during fermentation, reducing the chance of shifting or popping loose when pressure builds and releases through the airlock.
Product details:
Size: #5.5
Dimensions: approximately 1 1/8 inch by 15/16 inch
Pack of 6
Pre-drilled for standard fermenting airlocks
BPA free and made from food grade materials
Maximum temperature: 70 C / 158 F
These stoppers are well suited for:
Small mouth fermentation jugs
Secondary fermenters
Wine, cider, mead, kombucha, and beer projects
Replacing worn or missing bungs in your brewing setup
Because they are made from food grade materials, they are appropriate for beverage fermentation applications when used as directed. For best performance, match the stopper size carefully to your vessel opening and avoid exposing the stopper to temperatures above the stated maximum.
Key features:
Pack of 6 #5.5 drilled rubber stoppers
Slip resistant design for a more secure fit
Drilled to fit all standard size fermentation airlocks
Helps provide an airtight seal for proper fermentation
BPA free and food grade
Suitable for smaller mouth jugs and fermenters
For brewers and winemakers who need dependable, airlock ready stoppers for smaller vessels, these North Mountain Supply #5.5 drilled rubber stoppers offer a simple, secure and reusable option.
