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Optical Component Thread Adapters

Option 1: Purchase Your Adapter Using the Tables Below

Webpage Features:
 info iconClicking 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, SM2, 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 to External Adapters

External ThreadsINTERNAL THREAD
 SM05RMSM25 x 0.75C-MountM25.5 x 0.5SM1M26 x 0.706M27 x 0.5M27 x 0.75M27 x 1.0SM30M32 x 0.75M34 x 0.5M34 x 0.75M34 x 1.0M35 x 0.5M38 x 0.5M39 x 1.0T-MountM42 x 1.0M43 x 0.5M49 x 0.75SM2M52 x 0.75M62 x 0.75SM3
SM05-    info                  
RMSinfo-infoinfo Click for Details  Click for Details  Click for Details          Click for Details 
M25 x 0.75 info-  Click for Details     Click for Details            
C-MountClick for DetailsClick for Details Click for Detailsa Click for Details          Click for Details   Click for Details   
M25.5 x 0.5    -Click for Details                  
SM1Click for DetailsClick for DetailsClick for DetailsClick for DetailsClick for Details-Click for DetailsClick for DetailsClick for DetailsClick for DetailsClick for DetailsClick for DetailsClick for DetailsClick for DetailsClick for Details  Click for DetailsClick for Details  Click for Details  Click for Details
M26 x 0.706 Click for DetailsClick for Details  Click for Details-                 
M27 x 0.5     Click for Details -                
M27 x 0.75 Click for Details   Click for Details  -               
M27 x 1.0    Click for Details                
SM30     Click for Details    -         Click for Details   
M30 x 1.0     Click for Details                
M32 x 0.75 Click for DetailsClick for Details  Click for Details  Click for Details  - Click for Details       Click for Details   
M34 x 0.5     Click for Details      -           
M34 x 0.75Click for Details-
M35 x 0.5     Click for Details       -          
M36 x 1.5                   Click for Details   
T-Mount   Click for Details  Click for Details          -   Click for Details   
M42 x 1.0 Click for Details   Click for Details           -  Click for Details   
M49 x 0.75                   -Click for Details   
SM2 Click for DetailsClick for DetailsClick for Details Click for Details    Click for DetailsClick for Details  Click for DetailsClick for DetailsClick for DetailsClick for DetailsClick for DetailsClick for Details-Click for Details Click for Details
M52 x 0.75                    Click for Details-  
M54 x 0.75                   Click for Details   
SM3                   Click for Details  -
M95 x 1.0                     Click for Details
  • 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 to Internal Adapters

Internal Thread 1INTERNAL THREAD 2
 SM05RMSSM1SM2M62 x 0.75SM3
SM05Click for Details     
RMS    Click for Details 
SM1  Click for Details   
SM2   Click for Details  
M62 x 0.75 Click for Details    
SM3     Click for Details

External to External Adapters

External Thread 1EXTERNAL THREAD 2
 SM05C-MountSM1SM2M52 x 0.75SM3
SM05Click for DetailsClick for DetailsClick for Details   
C-MountClick for Details Click for DetailsClick for Details  
SM1Click for DetailsClick for DetailsClick for Details   
SM2 Click for Details Click for Details  
M52 x 0.75    Click for Details 
SM3     Click for Details

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-2AInternal Thread, 0.535"-40.0, UNS-2B
Max Major Diameter0.5340"Min Major Diameter0.5350"
Min Major Diameter0.5289"Min Pitch Diameter0.5188"
Max Pitch Diameter0.5178"Max Pitch Diameter0.5230"
Min Pitch Diameter0.5146"Min Minor Diameter (and 83.3% of thread)0.508"
Max Minor Diameter0.5069"Max Minor Diameter (and 64.9% of thread)0.514"
= 0.535"-40
RMS = 0.800"-36
C-Mount = CS-Mounta = 1.00"-32
SM1
SM1 Threading: Ø1" Lens Tubes, 30 mm Cage Systems
External Thread, 1.035"-40.0, UNS-2AInternal Thread, 1.035"-40.0, UNS-2B
Max Major Diameter1.0339"Min Major Diameter1.0350"
Min Major Diameter1.0288"Min Pitch Diameter1.0188"
Max Pitch Diameter1.0177"Max Pitch Diameter1.0234"
Min Pitch Diameter1.0142"Min Minor Diameter (and 83.3% of thread)1.008"
Max Minor Diameter1.0068"Max Minor Diameter (and 64.9% of thread)1.014"
= 1.035"-40
SM30
SM30 Threading: Ø30 mm Lens Tubes
External Thread, M30.5x0.5Internal Thread, M30.5x0.5
Max Major Diameter30.480 mmMin Major Diameter30.500 mm
Min Major Diameter30.371 mmMin Pitch Diameter30.175 mm
Max Pitch Diameter30.155 mmMax Pitch Diameter30.302 mm
Min Pitch Diameter30.059 mmMin Minor Diameter (and 83.3% of thread)29.959 mm
Max Minor Diameter29.938 mmMax Minor Diameter (and 64.9% of thread)30.094 mm
= M30.5 x 0.5
T-Mount = M42 x 0.75
SM2
SM2 Threading: Ø2" Lens Tubes, 60 mm Cage Systems
External Thread, 2.035"-40.0, UNS-2AInternal Thread, 2.035"-40.0, UNS-2B
Max Major Diameter2.0338"Min Major Diameter2.0350"
Min Major Diameter2.0287"Min Pitch Diameter2.0188"
Max Pitch Diameter2.0176"Max Pitch Diameter2.0239"
Min Pitch Diameter2.0137"Min Minor Diameter (and 83.3% of thread)2.008"
Max Minor Diameter2.0067"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-2AInternal Thread, 3.035"-40.0, UNS-2B
Max Major Diameter3.0337"Min Major Diameter3.0350"
Min Major Diameter3.0286"Min Pitch Diameter3.0188"
Max Pitch Diameter3.0175"Max Pitch Diameter3.0242"
Min Pitch Diameter3.0133"Min Minor Diameter (and 83.3% of thread)3.008"
Max Minor Diameter3.0066"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.

Option 2: Choose Your Adapter by Clicking on the Boxes Below



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