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Silver G1/4 inch ultra low profile hex stop plug with O-ring

Barrow Mods

Barrow Mods G1/4" Ultra Low Profile Hex Stop Plug Silver

SKU CH-551P-9F947

Seals any G1/4" threaded port with an ultra-low-profile hex head and included O-ring

  • Key featuresGreat for reservoirs that use G1/4 in thread.

Color Silver

  • Seals any G1/4" port with an ultra low-profile design
  • Includes an O-ring for a reliable, leak-free seal
  • Hex head allows easy installation with a standard wrench
  • Silver finish matches common loop aesthetics
  • Purpose-built for reservoirs and other G1/4" threaded components

G1/4" Threaded Port Plug

This silver hex stop plug seals any G1/4" threaded port in a custom liquid-cooling loop. It is designed for builders who need a clean, low-profile closure on reservoirs, radiators or distribution blocks. The ultra-low profile keeps the fitting nearly flush with the component surface. An included O-ring provides a reliable seal without additional tape or compound.

Verify G1/4" Thread Compatibility

Confirm that every port you intend to close uses a standard G1/4" BSPP thread before ordering. Check the component manufacturer's specification sheet for thread size and pitch. Ensure there is enough clearance around the port for a hex key to engage the fitting's low-profile head. The plug is not compatible with NPT, metric or proprietary thread standards.

Completes a Loop Without Extra Fittings

The plug terminates unused ports directly, eliminating the need for a short tube run and a separate fitting pair. It frees up space inside tight chassis areas where a barb or compression fitting would protrude. The silver finish matches common nickel-plated components for a consistent aesthetic. No additional tools beyond a suitable hex key are required for installation.

How it compares

Measured against everything we stock in Heatsinks & Water Blocks, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 93% of the 609 comparable items (median $15.99).

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Specifications

Product
Brand nameBarrow
Model nameTBLDS-Silver
Part numberTBLDS-Silver

Other versions of this model

5 more in the same range

Questions about this item

Does the Barrow TBLDS-Silver plug come with the O-ring or must I buy it separately?

The plug ships with an O-ring already installed, so no separate seal purchase is needed.

I see only a silver version listed — are other colours or thread sizes available for this model?

This specific TBLDS-Silver model is offered only in silver with a G1/4" thread; other colours or sizes would be different part numbers.

How much clearance does the ultra-low-profile hex head add above a reservoir port once tightened?

The ultra-low-profile hex head sits nearly flush, adding only a few millimetres of height above the port surface.

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