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Four black sparkle compression fittings with G1/4 threads for 3603 tubing

Bitspower

Bitspower G1/4" Black Sparkle Compression Fitting CC5 V3 for 3603 Tube (4 pcs)

SKU CH-KGPK-7CMN6

Connects 3603 tubing with G1/4" thread using a Hi-Flow compression design and hidden O-ring seal in a four-piece pack

  • True Hi-Flow design for unrestricted coolant movement
  • High-durability Black Sparkle nickel finish resists wear
  • Hiding O-ring design keeps seals out of sight
  • World-first compression fitting engineered for Tygon 3603 tubing
  • RoHS-compliant materials meet environmental standards

Tube Compatibility & Pack Size

These compression fittings are built for soft tubing with a 1/2" inner diameter and 3/4" outer diameter, matching the Tygon 3603 specification. Each pack contains four pieces, ready for a standard custom-loop build. The G1/4" thread fits common water-block and radiator ports.

Upgrade From Standard Barbs

The compression design replaces traditional barb-and-clamp connections, removing the need for separate hose clamps and reducing leak points. The hidden O-ring seals directly against the tube wall, so the step up is worthwhile when you want a cleaner look and a more reliable seal without extra hardware.

G1/4" Thread Limits

The 5 mm thread length suits typical component ports but may not engage fully in unusually thick or recessed ports. The fitting is specific to the 3603 tube dimensions; other soft-tube sizes will not seal correctly. RoHS compliance confirms restricted-substance limits for the plating.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $24.99
Pricier than about 61% of the 2,955 comparable items (median $17.99).

Specifications

No published specifications for this item yet.

Questions about this item

What tube dimensions does the G1/4" compression fitting accept?

It is made for soft tubing with a 1/2" inner diameter and 3/4" outer diameter, matching the Tygon 3603 specification.

How do I install the compression fitting without damaging the O-ring?

Slide the compression nut onto the tube, push the tube fully over the barbed base until it seats against the hidden O-ring groove, then hand-tighten the nut — over-tightening with tools can crush the seal.

When should I replace the O-rings inside these fittings?

Inspect the hidden O-rings during any loop drain or yearly maintenance; replace them if they show flattening, cracking or loss of elasticity to prevent leaks.

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