Can gas barb be used for 3/8'' ID hose?

Yes , but you need to clamp it tight.

What size is the bore ?

Thank you for your question. The swivel nut is standard 7/16-20 UNF thread.

The barbs seems smaller than advertised….the 5/16 is definitely smaller than regulator 5/16. Why is that

Thank you for your question. Some 5/16'' barbs of keg regulators are 3/8'' barbs actually.

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MRbrew 1 Pair Ball Lock Disconnect Set, Home Brew Ball Lock Corny Keg Fittings for Keg Posts Coupler, with Stainless Steel 5/16'' Gas & 1/4'' Liquid Barbs & Extra 2 Hose Clamps & MFL Swivel Nuts

MRbrew 1 Pair Ball Lock Disconnect Set, Home Brew Ball Lock Corny Keg Fittings for Keg Posts Coupler, with Stainless Steel 5/16'' Gas & 1/4'' Liquid Barbs & Extra 2 Hose Clamps & MFL Swivel Nuts

4.4/5

Product ID: 80372090

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💧Leak-proof hose clamps included

🔩MFL swivel nuts for quick hose changes

🛡️Stainless steel corrosion resistance

Description

🍺 Unlock Your Brew’s Full Potential with MRbrew Precision!

DURABLE CLEANABLE - PBT material resists oil and rust, ensuring longevity and easy maintenance.
COMPLETE LEAK PROOF KIT - Includes 5/16’’ gas & 1/4’’ liquid barbs plus clamps for airtight connections.
SATISFACTION GUARANTEED - Backed by reliable quality and unconditional support for your brewing peace of mind.
VERSATILE COMPATIBILITY - Fits most Cornelius and soda kegs—perfect for homebrew, soda, and more.
EFFORTLESS HOSE SWAPPING - MFL quick disconnects with swivel nuts streamline your keg setup and upgrades.

The MRbrew Ball Lock Disconnect Set features MFL swivel nuts for quick hose changes, durable PBT and stainless steel construction for corrosion resistance, and includes all necessary barbs and clamps for leak-proof connections. Designed for Cornelius and soda kegs, it’s the ultimate upgrade for home brewers seeking reliability, versatility, and easy maintenance.