Tried to print jijimath's toothpaste transfer tube but it somehow did not fit as nicely as I'd like on my travel sized & regular Colgate tubes.

Did some measurements and used mike_linus' Nut Job customizer to create a taller nut.

this one work perfectly for Colgate tubes.

Printed at 0.1 layer height and 100% infill, but you'd probably be able to get away with less.

Settings used:-

Component Type: Nut
Nut Type: Normal
Nut Diameter: 18
Nut Height: 19.5
Nut Thread Outer Diameter: 13
Nut Thread Step: 2
Nut Shape Degrees: 45
Nut Ratio: 0.5
Wing Ratio: 1 (Not Applicable)