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
Five brass and plastic M5 push-fit tube fittings with blue collars

Unique-Bargains

Unique-Bargains M5 Push-Fit Tube Fitting 4mm 1.75mm 5pcs

SKU CH-AV45-P01W7

Push-fit brass-and-plastic M5 fittings hold 4 mm OD PTFE tube for 1.75 mm filament, 19.5 mm tall with 0.8 mm thread pitch, pack of five

  • Push-fit design connects extruder to PTFE tube without tools
  • Brass and plastic body resists heat at the hot end
  • M5 × 0.8 thread fits standard extruder ports
  • 4 mm inner diameter matches 1.75 mm filament Bowden tubing
  • Pack of five fittings covers a full printer build

M5 Push-Fit Fitting 5 Pack

This pack contains five M5 push-to-fit connectors built from brass and plastic. Each fitting accepts a 4 mm outer-diameter PTFE tube for 1.75 mm filament. The thread pitch is 0.8 mm and total height measures 19.5 mm. They are designed to join an extruder and Bowden tube on compatible 3D printers.

Who These Suit and Who They Do Not

Makers running a Bowden-style extruder with M5-threaded ports and 4 mm PTFE tubing will find these a direct match. Builders whose hot-ends use a different thread size, a larger tube diameter or a compression-style fitting should look at other connection types instead.

M5 Thread with 4 mm Tube Bore

The decisive specification is the M5 × 0.8 thread combined with a 4 mm inner diameter at the blue collet end. Only printers that provide an M5 female port and run 4 mm OD PTFE for 1.75 mm filament can use these fittings without adapters.

Highlights

  • Push-fit design connects extruder to PTFE tube without tools
  • Brass and plastic body resists heat at the hot end
  • M5 × 0.8 thread fits standard extruder ports
  • 4 mm inner diameter matches 1.75 mm filament Bowden tubing
  • Pack of five fittings covers a full printer build

Specifications

BrandUnique Bargains

Questions about this item

How do I install the M5 push-fit fitting onto the extruder and avoid cross-threading the 0.8 mm pitch threads?

Start the M5 thread by hand until it seats flush, then tighten gently with a spanner; the 0.8 mm pitch engages quickly so stop as soon as resistance rises.

Will the brass-and-plastic collet or the internal seal need periodic replacement when used with 1.75 mm filament?

The brass body is durable, but the plastic collet and internal seal can wear from repeated tube insertion; inspect them when changing PTFE tubing and replace if the grip feels loose.

At what point does the 19.5 mm overall height become a clearance issue in a compact hot-end assembly?

The 19.5 mm height leaves little room above the heater block; measure the gap between the block and any fan shroud or cable guide before ordering to ensure the fitting clears.

Also in this aisle

People compared these

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