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Option 1: Purchase Your Adapter Using the Tables Below

Internal to External Adapters

Internal to Internal Adapters

External to External Adapters

Webpage Features:
	Clicking this icon below will open a window that contains a detailed description and ordering information for the corresponding adapter.

The following tables outline the optical component thread adapters currently offered by Thorlabs. Click on this icon Click for Details in the tables below to view details and purchase the adapter with the corresponding threads. Alternatively, you can view our adapters with SM05, RMS, M25 x 0.75, C-Mount, SM1, M32 x 0.75, SM1.5, SM2, M52 x 0.75, or SM3 threads by clicking on the boxes below (Option 2). We have a number of other threaded adapters that can be found on our General Adapters Guide. If you do not see an adapter or combination of adapters appropriate for your application, or to give feedback on our adapters selection guide tool, please contact techsupport@thorlabs.com.

INTERNAL THREAD


SM05	-
RMS		-				SM1A4, SM1A4TS, or SM1BC
M25 x 0.75			-
C-Mount				^a		SM1A9 or SM1A9TS
M25.5 x 0.5					-
SM1	SM1A6 or SM1A6T or SM1A6FW	SM1A3 or SM1A3TS		SM1A10 or SM1A10TS		-
M26 x 0.706							-
M27 x 0.5								-
M27 x 0.75									-
M27 x 1.0										-
SM30											-
M30 x 1.0
M32 x 0.75		RMSA9 or M32RMSS	M32A1 or M32M25S			SM1A33 or M32SM1S						-
M34 x 0.5													-
M34 x 0.75														-
M35 x 0.5															-
M36 x 1.5
SM1.5																-
T-Mount																	-
M42 x 1.0																		-
M49 x 0.75																			-
SM2			SM2A33 or GCMA1									SM2A22 or M2M32S								-
M52 x 0.75																					-
M54 x 0.75
SM3																						-
M95 x 1.0

The CS- and C-Mount standards feature the same 1.00"-32 threads, but C-Mounts have a 5 mm longer flange-to-sensor distance. The CML05 CS-Mount to C-Mount Adapter allows CS-Mount camera bodies to be used with lenses designed for C-Mount camera bodies.

INTERNAL THREAD 2

M62 x 0.75

EXTERNAL THREAD 2

Reference:
Click on the links below for detailed specifications of our SM-series threads.

SM05

SM05 Threading: Ø1/2" Lens Tubes, 16 mm Cage Systems
External Thread, 0.535"-40.0, UNS-2A		Internal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter	0.5340"	Min Major Diameter	0.5350"
Min Major Diameter	0.5289"	Min Pitch Diameter	0.5188"
Max Pitch Diameter	0.5178"	Max Pitch Diameter	0.5230"
Min Pitch Diameter	0.5146"	Min Minor Diameter (and 83.3% of thread)	0.508"
Max Minor Diameter	0.5069"	Max Minor Diameter (and 64.9% of thread)	0.514"

= 0.535"-40
RMS = 0.800"-36
C-Mount = CS-Mount^a = 1.00"-32

SM1

SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2A		Internal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter	1.0339"	Min Major Diameter	1.0350"
Min Major Diameter	1.0288"	Min Pitch Diameter	1.0188"
Max Pitch Diameter	1.0177"	Max Pitch Diameter	1.0234"
Min Pitch Diameter	1.0142"	Min Minor Diameter (and 83.3% of thread)	1.008"
Max Minor Diameter	1.0068"	Max Minor Diameter (and 64.9% of thread)	1.014"

= 1.035"-40
SM30

SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5		Internal Thread, M30.5x0.5
Max Major Diameter	30.480 mm	Min Major Diameter	30.500 mm
Min Major Diameter	30.371 mm	Min Pitch Diameter	30.175 mm
Max Pitch Diameter	30.155 mm	Max Pitch Diameter	30.302 mm
Min Pitch Diameter	30.059 mm	Min Minor Diameter (and 83.3% of thread)	29.959 mm
Max Minor Diameter	29.938 mm	Max Minor Diameter (and 64.9% of thread)	30.094 mm

= M30.5 x 0.5
SM1.5

SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40.0, UNS-2A		Internal Thread, 1.535"-40.0, UNS-2B
Max Major Diameter	1.5339"	Min Major Diameter	1.5350"
Min Major Diameter	1.5288"	Min Pitch Diameter	1.5188"
Max Pitch Diameter	1.5177"	Max Pitch Diameter	1.5236"
Min Pitch Diameter	1.5140"	Min Minor Diameter (and 83.3% of thread)	1.508"
Max Minor Diameter	1.5068"	Max Minor Diameter (and 64.9% of thread)	1.514"

= 1.535"-40

T-Mount = M42 x 0.75
SM2

SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0, UNS-2A		Internal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter	2.0338"	Min Major Diameter	2.0350"
Min Major Diameter	2.0287"	Min Pitch Diameter	2.0188"
Max Pitch Diameter	2.0176"	Max Pitch Diameter	2.0239"
Min Pitch Diameter	2.0137"	Min Minor Diameter (and 83.3% of thread)	2.008"
Max Minor Diameter	2.0067"	Max Minor Diameter (and 64.9% of thread)	2.014"

= 2.035"-40
SM3

SM3 Threading: Ø3" Lens Tubes
External Thread, 3.035"-40.0, UNS-2A		Internal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter	3.0337"	Min Major Diameter	3.0350"
Min Major Diameter	3.0286"	Min Pitch Diameter	3.0188"
Max Pitch Diameter	3.0175"	Max Pitch Diameter	3.0242"
Min Pitch Diameter	3.0133"	Min Minor Diameter (and 83.3% of thread)	3.008"
Max Minor Diameter	3.0066"	Max Minor Diameter (and 64.9% of thread)	3.014"

= 3.035"-40

The CS- and C-Mount standards feature the same 1.00"-32 threads, but C-Mounts have a 5 mm longer flange-to-sensor distance.