We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass G 1/4in male/female extension coupler, black diamond-knurled finish, 35mm body

Bykski

Bykski G 1/4in Male/Female Extension Coupler 35mm

SKU CH-1YY6-0KF3E

A G 1/4in male-to-female brass extension coupler adds 35 mm of clearance for custom-loop fittings

  • TypeCPU Block
  • ColorBlack
  • Extends fittings by 35 mm for clearance
  • Diamond knurling gives secure grip during installation
  • Brass construction resists corrosion in non-aluminium loops
  • G 1/4 in threads fit standard water-cooling components
  • Overall height 40 mm including threads for planning

Extension Coupler for Custom Loops

The Bykski G 1/4in Male/Female Extension Coupler adds 35 millimetres of thread length to any G 1/4in fitting in a custom water-cooling loop. It suits builders who need extra clearance between components or want to reposition a block, radiator or reservoir without re-plumbing the entire circuit. The brass body with diamond knurling provides a secure grip during installation. It is intended for non-aluminium loops only.

Verify Thread Standard and Coolant Compatibility

Before ordering, confirm that every component you plan to connect uses a G 1/4in thread; other thread standards will not seal correctly. The manufacturer warns that the internal finish may react with distilled-water-based coolants and is not compatible with PrimoChill Opaque or VUE coolant series. Using those fluids can cause damage, so choose a compatible coolant or a different fitting if your loop requires them.

Brass Construction and Knurled Grip

The coupler is machined from brass and measures 40 millimetres overall height including threads, with a 35 millimetre unthreaded section. Diamond-pattern knurling on the exterior allows hand-tightening and easy removal without tools, reducing the risk of scratching adjacent parts. The male-to-female design threads directly into an existing female port and presents a new female port for the next fitting, keeping the loop tidy and leak-free when assembled correctly.

Highlights

  • Extends fittings by 35 mm for clearance
  • Diamond knurling gives secure grip during installation
  • Brass construction resists corrosion in non-aluminium loops
  • G 1/4 in threads fit standard water-cooling components
  • Overall height 40 mm including threads for planning

Specifications

TypeCPU Block
ColorBlack

Questions about this item

What comes in the package and is any extra hardware required for installation?

The box contains one male/female G 1/4in extension coupler; no additional parts are needed if your loop already uses G 1/4in fittings.

How do I decide between the 35 mm and 40 mm height figures listed for this coupler?

The 35 mm measurement is the body length without threads, while 40 mm includes the threaded portions; choose based on the clearance you need between components.

What does the G 1/4in thread specification mean when I install this in my custom loop?

It confirms the coupler fits any standard G 1/4in threaded fitting, letting you extend a connection by 35 mm without changing your existing tubing or blocks.

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.