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Black brass expansion joint with diamond knurling, adjustable from 41 to 69 mm

Bykski

Bykski G 1/4in SLI/CF Expansion Joint 41mm-69mm diy cooling

SKU CH-K5FX-C3RDM

Adjustable brass SLI bridge spans 41mm to 69mm with G 1/4in threads for custom GPU loops

  • Product typeCPU Block
  • Product colorBlack
  • Adjustable 41mm-69mm span bridges GPU blocks precisely
  • G 1/4in thread fits standard water-cooling fittings
  • Diamond-knurled brass body allows secure hand tightening
  • Brass construction suits non-aluminium custom loops
  • Single expansion joint included for immediate installation

GPU loop connector

The Bykski G 1/4in SLI/CF Expansion Joint bridges the gap between two graphics-card water blocks in a custom loop. Its adjustable length lets builders match the exact spacing of their specific cards without cutting rigid tubing. The fitting accepts any standard G 1/4in threaded component.

Brass construction and coolant limits

The body is machined from diamond-knurled brass for a secure grip during installation. Because of the internal finish the manufacturer warns that the joint may not be suitable for distilled-water coolants and is not compatible with PrimoChill Opaque or VUE series fluids. Use is at the builder’s own risk.

Replaces fixed rigid-tube runs

This adjustable joint removes the need to measure, cut and bend hard tubing to a precise 41 to 69 millimetre span between blocks. The jump is worth it when card slot spacing varies between builds or when a single loop design must serve multiple motherboard layouts. It is not for loops that use aluminium components.

How it compares

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

Price $23.99
Pricier than about 67% of the 609 comparable items (median $15.99).

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Specifications

Product
Product typeCPU Block
Product colorBlack

Questions about this item

How do I install the Bykski G 1/4in SLI/CF Expansion Joint and what step do people often get wrong?

Thread each end into G 1/4in ports on the GPU blocks, then extend the joint between 41mm and 69mm to match the card spacing; the step many miss is tightening both lock rings evenly so the joint stays centred under pressure.

What maintenance or replacement will the expansion joint need later?

Inspect the O-rings and brass threads during loop drains; replace the joint if the knurled surface shows corrosion or if the adjustable range no longer holds at 41mm or 69mm.

What limit appears first under sustained use with this expansion joint?

The brass body and G 1/4in threads set the pressure ceiling; exceeding the loop's rated pressure or using incompatible coolants such as PrimoChill Opaque or VUE will cause leaks before the adjustable mechanism itself fails.

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