T2, M42, M48, 1.25" adapters

Somehow I keep loosing these adapters, so here is a 3D printable set of anything I could think off. Obviously print them in a colour that doesn't allow light to come through, black is a good choice. PETG seems a good choice, it is a little flexible which is of benefit for the threads.

T2 extender set:

• 5mm (supports required)
• 7.5mm
• 10mm
• 15mm
• 30mm
• 50mm

T2-T2 adapter: 

• T2-T2.stl: supports required
• T2-T2-builtinsupport.stl: builtin support

M42-M48 adapter to insert 2" filters, standard pitch is 0.75, Baader Planetarium filters might be 0.60:

• M42-M48.stl: supports required
• M42-M48-builtinsupport.stl: builtin support
• M42-M48-0.60.stl: 0.60 pitch for Baader, supports required
• M42-M48-0.60-builtinsupport.stl: builtin supports

M42 external thread for 1.25" filters (1.125", 42 tpi):

• M42-1_25_filter.stl

M42 external thread to 1.25" tube:

• M42-1_25-20mm.stl
   

1.25" to 1.25" adapter, 1.125" inner thread, 42 tpi:

• 1.25-1.25.stl: supports required
• 1.25-1.25-builtinsupport.stl: builtin support

inner T2 - outer M42 adapter

• t2-m42.stl: supports required

Unless stated otherwise:

• external M42 threads are 3 mm.
• M42 pitch is 0.75.

Tested with:

• tolerances are about 0.2mm
• 0.40 mm nozzle at 0.10 mm layer height
• 0.60 mm nozzle at 0.15 and 0.20 mm layer heights
• PETG
• 3 permimeters
• Ensure vertical shell thickness: Off
• use minimal infill, most objects work with 0%

Todo:

• SCT to M42 adapter
• SCT to T2 adapter