M25x1.5 Blind Stuffing + Nut and TPU-Sealing / M25x1.5 Blindstopfen + Mutter und TPU-Dichtung

M25x1.5 threaded blind stuffing to close unused M25-openings.
Unused PG21-openings in housings are also possible to close with this blind-stuffing set, but it is necessary to widen the opening in some cases (see details below).

[1] Thread type:
  Metric tread

[2] Diameters for suitable openings:
  Diameters for M25x1.5 opening:
  a) threaded hole:                    23.5mm / M25x1.5 thread
  b) drill hole without thread:  25.0mm / no thread
  Diameters for PG21 opening:
  a) threaded hole:                    26.8mm / PG thread 
  b) drill hole without thread:  >28.3mm / no thread
  c) For a PG21 opening you can also use 
      https://www.printables.com/model/1503307-pg21-blind-stuffing-nut-and-tpu-sealing-pg21-blind
      as alternative .     

[3] Sealing:
  An optional TPU-sealing model file is available.

Print
Material:   PETG (blind stuffing, nut), TPU 95A (sealing)
Supports: not required
Brim:         not required
Serial printing (part by part) for better thread quality.

Assembly
Threaded opening:
Screw the blind stuffing into the M25x1.5 opening.
Optionally place sealing on stuffing before assembly.
Unthreaded opening:
Place blind stuffing in PG21/M25 opening and secure with M25x1.5 nut.
If necessary, widen the opening to >=25.0mm before assembly.
Optionally place sealing on stuffing before assembly.
Use a 1€ coin for turning of the blind stuffing.

Hint: 
Apply some silicone grease on the thread, so it can be easily be assembled and disassembled.
(Without grease, the thread tends to wind on and off somewhat “sticky”.)