Mini-Series Optical Posts
![](https://www.thorlabs.us/Images/GuideImages/1257_MiniSeries_12.jpg)
- Precision Ground Stainless Steel Posts
- 4-40 (M3) Tapped Hole in Base and Removable Setscrew in Top
- Ideal for Miniature and OEM-Level Optomechanical Assemblies
MS3R
MS2R
MS1.5R
MS1R
MS05R
AE4E25E
4-40 Internal and 1/4"-20 External Threads
AP8E4E
8-32 and 4-40 Threads
Front
MSR2 Iris Diaphagm Mounted on a Mini-Series Post in a Mini-Series Post Holder
MSA8
4-40 Internal and
8-32 External Threads
Back
MSA6/M
M3 Internal and
M6 External Threads
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Please Wait
Features
- Designed for Use in Limited Spaces and OEM Applications
- Essential Building Blocks for Small Assemblies
- Posts Feature Top- and Bottom-Located 4-40 (M3) Tapped Holes
- Adapters Available for 8-32 (M4) and 1/4"-20 (M6) Compatibility
- Compatible with Our Mini-Series Components and Accessories
Thorlabs' Mini-Series Posts are designed to facilitate the integration of our Mini-Series components and accessories into optomechanical setups within a limited space. These posts are designed for compact and OEM-level optomechanical assemblies. Each post includes a 4-40 (M3) setscrew and features top- and bottom-located 4-40 (M3) tapped holes. For compatibility with our standard optomechanical components, we offer post thread adapters to convert among 8-32, 4-40, and 1/4"-20 imperial thread types as well as the M3, M4, and M6 metric thread types. In addition, we offer the HW-KIT5(/M) 4-40 (M3) screw kit, available below, as well as 8-32 (M4) and 1/4"-20 (M6) screw kits for the hardware needed to assemble Mini-Series and standard optomechanical components.
Our Mini-Series Post Holders, which are directly compatible with our Mini-Series Breadboards, can be used to mount our Mini-Series posts while allowing for height adjustment. Alternatively, we also offer Mini-Series Pedestal Posts and Clamping Forks. Both types of posts are designed to support our Mini-Series Kinematic Mirror Mounts, Cylindrical Collimator Mount, and Iris Diaphragm.
Posted Comments: | |
ZHIYU DENG
 (posted 2024-09-04 17:35:44.59) The length of MS05R/M should be 12.5mm according to Solidworks model instead of 13mm. jdelia
 (posted 2024-09-09 10:11:12.0) Thank you for contacting Thorlabs and for bringing this to our attention. You are correct, the length is in fact 13 mm. We have corrected this error on our website. swaush
 (posted 2017-03-28 11:20:43.713) Can we use cage system rods instead of mini posts? They seem to have the same measures and threads. tfrisch
 (posted 2017-03-29 11:43:24.0) Hello, thank you for contacting Thorlabs. You can use cage rods as mini series posts, yes. cbrideau
 (posted 2016-08-31 20:25:18.813) It would be nice to see a version with captive screws like the CF125C. The 4-40 screws are hard to position and handle because they are so tiny. tfrisch
 (posted 2016-09-01 02:00:26.0) Hello, thank you for suggesting this. I've posted it in our internal engineering forum. user
 (posted 2012-02-23 00:56:56.0) Hi guys. What applications use these mini series posts and mounts? Trying to decide between these and the (less expensive) standard 1/2-in. Post system...also, do you have adapters if I want to use them on a full size breadboard with 1/4-20 holes? Thanks, Lev. acable
 (posted 2009-08-12 10:39:58.0) The socket in the thumbscrew for the MSRA90 is a bit to sloppy, this causes the wrench to bind in the socket. acable
 (posted 2007-11-04 09:36:41.0) Since this is a "new standard", please consider doing a better job in the main portion of the presentation of pointing out what the new standard actually is, i.e. the post size and threads. |
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![](https://www.thorlabs.us/images/TabImages/MSR1_M_OpticalPost_A1-150.jpg)
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Metric versions are denoted by a stepped edge on one side. The imperial versions have a chamfered edge.
- Available in Lengths from 0.5" to 3"
- Tapped 4-40 (M3) Hole and 4-40 (M3) Setscrew
- Designed to Mount Mini-Series Components and Accessories
These Mini-Series Ø6 mm posts, which have a 4-40 (M3) setscrew in one end and a 4-40 (M3) tapped hole in the other end, are manufactured using nonmagnetic 303 series stainless steel.
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These thread adapters are designed to interface our standard-series and our Mini-Series optomechanical components. This is a portion of Thorlabs' complete line of thread adapters, which are available for many common thread standards.
Mechanical Drawing | Item # | Thread A | Thread B | Length C | Typical Application |
---|---|---|---|---|---|
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AP8E4E | 8-32 | 4-40 | 0.38" (9.7 mm) |
Attach Components with 8-32 Tapped Holes to Imperial Mini-Series Posts |
AP4M3M | M4 | M3 | 0.38" (9.7 mm) |
Attach Components with M4 Tapped Holes to Metric Mini-Series Posts |
Mechanical Drawing | Item # | Thread A | Thread B | Length C | Typical Application |
---|---|---|---|---|---|
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MSA8 | 4-40 | 8-32 | 0.50" (12.7 mm) |
Attach Components with 8-32 Tapped Holes to Imperial Mini-Series Posts |
MSA4/M | M3 | M4 | 0.50" (12.7 mm) |
Attach Components with M4 Tapped Holes to Metric Mini-Series Posts |
|
MSA25 | 4-40 | 1/4"-20 | 0.55" (14.0 mm) |
Attach Components with 1/4"-20 Tapped Holes to Imperial Mini-Series Posts |
|
MSA6/M | M3 | M6 | 0.55" (14.0 mm) |
Attach Components with M6 Tapped Holes to Metric Mini-Series Posts |
Mechanical Drawing | Item # | Thread A | Thread B | Length C | Typical Application |
---|---|---|---|---|---|
|
AE4E25E | 4-40 | 1/4"-20 | 0.38" (9.5 mm) |
Attach Mini-Series Bases to 1/4"-20-Threaded Optical Tables |
AE3M6M | M3 | M6 | 0.39" (10.0 mm) |
Attach Mini-Series Bases to M6-Threaded Optical Tables |
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- Ideal for our Mini-Series Breadboards and Optic Mounts
- We also Offer Individual Cap Screws and Setscrews
HW-KIT5 4-40 Hardware Kit | |||
---|---|---|---|
Item | Approx. Qty. | Item | Approx. Qty. |
4-40 Cap Screw, 3/16" Long (SH4S019) | 165 | 4-40 Nut | 200 |
4-40 Cap Screw, 1/4" Long (SH4S025) | 135 | #4 Washer | 350 |
4-40 Cap Screw, 5/16" Long (SH4S031) | 135 | 3/32" Hex Key for 4-40 Cap Screws | 10 |
4-40 Cap Screw, 3/8" Long (SH4S038) | 125 | 0.050" Hex Key for 4-40 Setscrews (HK050) | 10 |
4-40 Setscrew, 1/4" Long (SS4S025) | 190 | - | - |
HW-KIT5/M M3 x 0.5 Hardware Kit | |||
---|---|---|---|
Item | Approx. Qty. | Item | Approx. Qty. |
M3 x 0.5 Cap Screw, 5 mm Long (SH3M5) | 165 | M3 x 0.5 Nut | 220 |
M3 x 0.5 Cap Screw, 6 mm Long (SH3M06) | 150 | M3 Washer | 220 |
M3 x 0.5 Cap Screw, 8 mm Long (SH3M8) | 125 | 2.5 mm Hex Key for M3 Cap Screws | 10 |
M3 x 0.5 Cap Screw, 10 mm Long (SH3M10) | 125 | 1.5 mm Hex Key for M3 Setscrews | 10 |
M3 x 0.5 Setscrew, 6 mm Long (SS3M6) | 195 | - | - |