Library › Cameras & lenses › T-mount (T2): M42 × 0.75 thread, 55 mm flange, thread rings

M42 × 0.75 (T2) internal thread ring section

M42 × 0.75 (T2) internal thread ring section: ISO 68-1 basic profile, minor Ø41.188, pitch Ø41.513, major Ø42, pitch 0.75; 6 long (8 turns), outside Ø46 (design choice); exact nominal, no tolerance

Exact dimensions. True size, no printing tolerance added. Threads are plain cylinders at the major diameter.

STEP STL free, CC BY 4.0 (credit "Xem Studio")

Dimensions

parameter	thread
value	M42 × 0.75
from	standard

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From the full sheet

T-mount (T2): M42 × 0.75 thread, 55 mm flange, thread rings: every size, notes, mating features and sources. What is the T-mount (T2) flange focal distance?

Other sizes

M42 × 0.75 (T2) external thread ring section