Xem Studiomeasured geometry

Library › Cameras & lenses › Lens filter threads: M40.5 × 0.5 to M112, pitch table and thread rings

M40.5 × 0.5 filter external thread ring section

M40.5 × 0.5 filter external thread ring section: ISO 68-1 basic profile, major Ø40.5, pitch Ø40.175, minor Ø39.959, pitch 0.5; 4 long (8 turns), bore Ø35.959 (wall is a 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

threadM40.5 × 0.5
major Ø D (mm)40.5
pitch P (mm)0.5
pitch Ø D2 (mm)40.175
minor Ø D1 (mm)39.959
thread depth 5H/8 (mm)0.271
pitch fromMarumi
filesmale + female rings
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From the full sheet

Lens filter threads: M40.5 × 0.5 to M112, pitch table and thread rings: every size, notes, mating features and sources. What thread pitch is a 67 mm (or 52, 77, 82 mm) lens filter?

Other sizes