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

Barrow Mods

Barrow Mods G1/4" Ultra Low Profile Hex Stop Plug Fitting Black TBLDS

SKU CH-FZ95-RXNFZ

G1/4" ultra-low-profile hex stop plug with O-ring seals unused ports on custom-loop reservoirs and blocks

  • FeaturesGreat for reservoirs that use G1/4" thread.

Color Black

  • Ultra-low profile saves space in tight loops
  • G1/4" thread fits standard water-cooling ports
  • Integrated O-ring seals without extra washers
  • Hex head allows tool-tight installation
  • Single plug closes unused reservoir or block ports

G1/4 Thread Reservoir Plug

This Barrow Mods plug fitting seals any G1/4 threaded port on a reservoir or water-block. The ultra-low-profile hex body fits tight spaces where standard plugs would interfere with tubing runs. An included O-ring provides a reliable seal without additional tape or sealant. It is intended for custom-loop builders who need to close unused ports cleanly.

Black Hex Stop With O-Ring

The all-black finish matches dark-themed builds while the hex head allows easy installation with a standard spanner. Threaded G1/4 compatibility means it works with the vast majority of reservoir tops, pump tops and radiator ports. Low profile height reduces the chance of snagging cables or adjacent fittings during maintenance. One piece is supplied per pack.

Replaces Basic Port Caps

This fitting upgrades from plastic dust caps or tall hex plugs that protrude into the loop layout. The jump is worth it when clearance around the port is limited or when a uniform black aesthetic matters. Builders who need multiple ports sealed should order one unit per opening. It does not serve as a drain or fill valve.

Highlights

  • Ultra-low profile saves space in tight loops
  • G1/4" thread fits standard water-cooling ports
  • Integrated O-ring seals without extra washers
  • Hex head allows tool-tight installation
  • Single plug closes unused reservoir or block ports

Specifications

BrandBarrow
ModelTBLDS
FeaturesGreat for reservoirs that use G1/4" thread.
Part NumberTBLDS

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Questions about this item

What thread standard does this plug use, and which ports does it seal?

It uses a G1/4" thread and seals any port with that same thread, such as reservoir inlets or outlets.

What physical clearance does the ultra low profile hex head need?

The hex head sits nearly flush with the port surface, so it fits in tight spaces where a taller plug would foul adjacent components.

How is the O-ring seated during installation, and what mistake should be avoided?

The O-ring sits in the groove on the plug body; tighten by hand until the ring compresses, then give a light turn with a hex key — over-tightening damages the ring and can strip the port threads.

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