Optical Component Threading Adapters with M32 x 0.75 Threads


  • Integrate M32 x 0.75 Threaded Components with Other Industry-Standard Threads
  • Adapters Available with Either Internal or External
    M32 x 0.75 Threads

M32RMSS

Brass Microscope Adapter, External M32 x 0.75 Threads and Internal RMS Threads

SM1A34

External SM1 Threads and Internal M32 x 0.75 Threads

CSN100

M32M25S

N40X-PF

M32M25S Adapter Connecting a Nikon Objective to a Cerna® Nosepiece

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Interactive Selection Guide

M32 x 0.75-Threaded Optical Component Adapters

This page contains all of our Optical Component Thread Adapters that feature M32 x 0.75 threading. Adapters that have both internal and external threads are available.

The brass microscope adapters below are ideal for use in our Bergamo® and Cerna® imaging systems. They feature a lip to prevent the microscope objective from being threaded too far onto the mount, and their brass construction is harder than aluminum and less likely to bind to the objective threading.

These M32 x 0.75 adapters are a subset of our entire line of optical component thread adapters. To view the entire line, please see our Interactive Adapters Selection Guide.

Adapters with External M32 x 0.75 and Internal Industry-Standard Threads
Item # Typical Application External Threads Internal Threads
RMSA9 info Integrate RMS Objective with M32 x 0.75 Mount M32 x 0.75 RMS (0.800"-36)
M32RMSSa info Integrate RMS Objective with M32 x 0.75 Mount M32 x 0.75 RMS (0.800"-36)
M32A1 info Integrate M25 x 0.75 Objective with M32 x 0.75 Mount M32 x 0.75 M25 x 0.75
M32M25Sa info Integrate M25 x 0.75 Objective with M32 x 0.75 Mount M32 x 0.75 M25 x 0.75
SM1A33 info Integrate SM1 Lens Tube with M32 x 0.75 Mount M32 x 0.75 SM1 (1.035"-40)
M32SM1Sa info Integrate SM1 Lens Tube with M32 x 0.75 Mount M32 x 0.75 SM1 (1.035"-40)
M32M26Sa info Integrate M26 x 0.706 Objective with M32 x 0.75 Mount M32 x 0.75 M26 x 0.706
M32M27Sa info Integrate M27 x 0.75 Objective with M32 x 0.75 Mount M32 x 0.75 M27 x 0.75
M32M271Sa info Integrate M27 x 1.0 Objective with M32 x 0.75 Mount M32 x 0.75 M27 x 1.0
M32M34Sa info Integrate M34 x 1.0 Objective with M32 x 0.75 Mount M32 x 0.75 M34 x 1.0
M32M40Sa info Integrate M40 x 0.706 Objective with M32 x 0.75 Mount M32 x 0.75 M40 x 0.706
SM2A23 info Integrate SM2 Lens Tube into
M32 x 0.75 Mount		 M32 x 0.75 SM2 (2.035"-40)
  • This brass adapter has a flange to prevent overthreading the adapter or the objective into a microscope nosepiece. Brass is harder than aluminum which reduces thread binding.
Adapters with Internal M32 x 0.75 and External Industry-Standard Threads
Item # Typical Application External Threads Internal Threads
RMSA10 info Attach M32 x 0.75 Objective to RMS Mount RMS (0.800"-36) M32 x 0.75
M32A2 info Integrate M32 x 0.75 Objective with M25 x 0.75 Mount M25 x 0.75 M32 x 0.75
SM1A34 info Attach M32 x 0.75 Objective to SM1 Lens Tube SM1 (1.035"-40) M32 x 0.75
SM2A22 info Integrate M32 x 0.75 Objective into
SM2 Lens Tube		 SM2 (2.035"-40) M32 x 0.75
M2M32S info Integrate M32 x 0.75 Objective with SM2 Mount SM2 (2.035"-40) M32 x 0.75

Thorlabs' Threading Specifications

Thorlabs' lens tubes utilize a series of non-standard threadings. Threading specifications are given below for our SM threadings utilized in our lens tube and cage system components so that you can machine mating components to suit your application. We also offer products with C-Mount and RMS threadings, and the specifications for these threadings are also given below. Please note that other manufacturers may have different tolerances for these threads. For other thread specifications that are not listed here, please contact Tech Support.


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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"
RMS Threading: Objective, Scan, and Tube Lenses
External Thread, 0.800"-36.0, UNS-2A Internal Thread, 0.800"-36.0, UNS-2B
Max Major Diameter 0.7989" Min Major Diameter 0.8000"
Min Major Diameter 0.7934" Min Pitch Diameter 0.7820"
Max Pitch Diameter 0.7809" Max Pitch Diameter 0.7866"
Min Pitch Diameter 0.7774" Min Minor Diameter (and 83.3% of thread) 0.770"
Max Minor Diameter 0.7688" Max Minor Diameter (and 64.9% of thread) 0.777"
C-Mount Threading: Machine Vision Lenses, CCD/CMOS Cameras
External Thread, 1.000"-32.0, UN-2A Internal Thread, 1.000"-32.0, UN-2B
Max Major Diameter 0.9989" Min Major Diameter 1.0000"
Min Major Diameter 0.9929" Min Pitch Diameter 0.9797"
Max Pitch Diameter 0.9786" Max Pitch Diameter 0.9846"
Min Pitch Diameter 0.9748" Min Minor Diameter (and 83.3% of thread) 0.966"
Max Minor Diameter 0.9651" Max Minor Diameter (and 64.9% of thread) 0.974"
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"
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
SM1.5 Threading: Ø1.5" Lens Tubes
External Thread, 1.535"-40, UNS-2A Internal Thread, 1.535"-40, UNS-2B
Max Major Diameter 1.5339" Min Major Diameter 1.535"
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"
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"
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"

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Adapters with External M32 x 0.75 and Internal Industry-Standard Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
RMSA9 Support Documentation
RMSA9Customer Inspired! Adapter with External M32 x 0.75 Threads and Internal RMS Threads
$26.21
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M32RMSS Support Documentation
M32RMSSCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal RMS Threads
$27.26
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M32A1 Support Documentation
M32A1Customer Inspired! Adapter with External M32 x 0.75 Threads and Internal M25 x 0.75 Threads
$26.21
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M32M25S Support Documentation
M32M25SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal M25 x 0.75 Threads
$22.84
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SM1A33 Support Documentation
SM1A33Customer Inspired! Adapter with External M32 x 0.75 Threads and Internal SM1 Threads
$25.57
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M32SM1S Support Documentation
M32SM1SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal SM1 Threads
$37.15
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M32M26S Support Documentation
M32M26SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal M26 x 0.706 Threads
$25.85
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M32M27S Support Documentation
M32M27SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal M27 x 0.75 Threads
$29.49
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M32M271S Support Documentation
M32M271SBrass Microscope Adapter with External M32 x 0.75 Threads and Internal M27 x 1.0 Threads
$22.84
Today
M32M34S Support Documentation
M32M34SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal M34 x 1.0 Threads
$43.39
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M32M40S Support Documentation
M32M40SCustomer Inspired! Brass Microscope Adapter with External M32 x 0.75 Threads and Internal M40 x 0.706 Threads
$45.68
Today
SM2A23 Support Documentation
SM2A23Customer Inspired! Adapter with External M32 x 0.75 Threads and Internal SM2 Threads
$26.21
Today

Adapters with Internal M32 x 0.75 and External Industry-Standard Threads

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
RMSA10 Support Documentation
RMSA10Customer Inspired! Adapter with External RMS Threads and Internal M32 x 0.75 Threads
$26.21
Today
M32A2 Support Documentation
M32A2Customer Inspired! Adapter with External M25 x 0.75 Threads and Internal M32 x 0.75 Threads
$26.21
Today
SM1A34 Support Documentation
SM1A34Customer Inspired! Adapter with External SM1 Threads and Internal M32 x 0.75 Threads
$25.57
Today
SM2A22 Support Documentation
SM2A22Customer Inspired! Adapter with External SM2 Threads and Internal M32 x 0.75 Threads
$26.21
Today
M2M32S Support Documentation
M2M32SCustomer Inspired! Brass Microscope Adapter with External SM2 Threads and Internal M32 x 0.75 Threads
$68.25
Today
Additional Optical Component Thread Adapters
  • SM05-Threaded Adapters

  • RMS-Threaded Adapters

  • M25 x 0.75-Threaded Adapters

  • C-Mount-Threaded Adapters

  • SM1-Threaded Adapters

  • M32 x 0.75-Threaded Adapters

  • SM1.5-Threaded Adapters

  • SM2-Threaded Adapters

  • M52 x 0.75-Threaded Adapters

  • SM3-Threaded Adapters