Products HomeVacuum-Compatible Screws
- Vented Cap Screws, Vented Setscrews, and Thumbscrews for Vacuum Use
- Constructed of 316 Stainless Steel, A4 Stainless Steel, or 2024-T3 Aluminum
- All Screws are Shipped Double Vacuum-Bagged
SS25S075V
1/4"-20 Vented Setscrews
SH6MS20V
M6 x 1.0 Vented Cap Screws
TS25HV
Vacuum-Compatible
Thumbscrews
SH8S050V
8-32 Vented Setscrews
SH4MS12V
M4 x 0.7 Vented Cap Screws
Vented screws provide a path for gases to escape blind tapped holes.
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Additional Vacuum-Compatible Components
Many of our other Optomechanical Components can be special ordered for vacuum use. Contact Tech Support for details.
Click to EnlargeVented screws allow trapped gases to escape while under vacuum.
Features
- Vented 8-32, M4 x 0.7, 1/4"-20, or M6 x 1.0 Cap Screws and Setscrews
- Vacuum-Compatible Thumbscrews
- All Components Usable with 10-6 Torr Environments Directly Out of the Packaging
- Compatible with Lower Pressures with Additional User Processing
- All Components are Shipped Double Vacuum Bagged for Cleanroom Use
This page features vacuum-compatible versions of our most popular screws. These screws are fabricated from specially selected grades of stainless steel and aluminum for vacuum and cleanroom use. All components are packaged in double airtight bags for cleanroom and vacuum chamber applications. The cross section of a vented screw to the right illustrates the benefits of vented screws when used within a vacuum chamber. We also offer standard cap screws and setscrews in a variety of sizes.
Vacuum Compatibility Information
Our vacuum-compatible screws are chemically cleaned and prepared for vacuum applications before packaging. They are compatible directly out of the packaging with vacuum environments down to 10-6 Torr. With additional cleaning and processing, they can be used at even lower pressures, only limited by the outgassing rate of the aluminum or stainless steel (see the Vacuum Specs tab above or the tables below). The material properties of the aluminum or stainless steel and the cleaning methods completed by the end user should be used to determine the appropriateness of these products and materials in a specific vacuum system.
We also offer other optomechanical components which may be used in vacuum applications. Many of our Polaris™ Mirror Mounts are vacuum compatible. We also offer Unanodized Aluminum or Passivated Stainless Steel Breadboards, which may be used in vacuum applications after undergoing cleaning and processing by the end user.
Vacuum Compatibility Specs
| Item | Vented Cap Screws & Washers | Vented Setscrews | Thumbscrews |
|---|---|---|---|
| Vacuum Compatibility as Packageda | >10-6 Torr | ||
| Materials | 316 Stainless Steel (Imperial) A4 Stainless Steel (Metric) | 2024-T3 Aluminum | |
| Preparation and Packaging | Chemically Cleaned and Double Vacuum Bagged | ||
| Aluminum / Stainless Steel Outgassing Rate at 20 °C | 1.8 x 10-8 Torr-Liters/s/cm2 | 7.6 x 10-9 Torr-Liters/s/cm2 | |
| Posted Comments: | |
ojanguren
(posted 2018-05-04 07:55:49.787) Dear Sirs,
Is it posible to purchase Vented cap screws made of Titanium?
Regards,
Inigo llamb
(posted 2018-05-04 05:42:13.0) Hello Inigo, thank you for contacting Thorlabs. We cannot offer titanium vented cap screws unfortunately. Perhaps a different vendor, such as Vacom in Germany, may be able to offer such titanium screws. |
Zoom| Item # | Thread Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SH8S038V | 3/8" (9.5 mm) | 9/64" | Ø0.04" (Ø1.1 mm) |
316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SH8S050V | 1/2" (12.7 mm) |
Zoom| Item # | Thread Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SH4MS10V | 10 mm (0.39") | 3 mm | Ø1.0 mm (Ø0.04") |
A4 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SH4MS12V | 12 mm (0.47") |
Zoom| Item # | Thread Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SH25S038V | 3/8" (9.5 mm) | 3/16" | Ø0.0625" (Ø1.6 mm) |
316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SH25S050V | 1/2" (12.7 mm) | ||||||
| SH25S063V | 5/8" (15.9 mm) | ||||||
| SH25S075V | 3/4" (19.1 mm) | ||||||
| SH25S100V | 1" (25.4 mm) |
| Item # | Outer Diameter | Inner Diameter | Thickness | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C |
Quantity |
|---|---|---|---|---|---|---|---|
| W25S050V | 0.505" ± 0.10" | 0.286 ± 0.10" (1/4" and M6 Compatible) |
0.064" ± 0.007" | 316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 25 |
Zoom| Item # | Thread Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SH6MS10V | 10 mm (0.39") | 5 mm | Ø0.0625" (Ø1.6 mm) |
A4 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SH6MS12V | 12 mm (0.47") | ||||||
| SH6MS16V | 16 mm (0.63") | ||||||
| SH6MS20V | 20 mm (0.79") | ||||||
| SH6MS25V | 25 mm (0.98") |
| Item # | Outer Diameter | Inner Diameter | Thickness | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C |
Quantity |
|---|---|---|---|---|---|---|---|
| W25S050V | 0.505" ± 0.10" | 0.286 ± 0.10" (1/4" and M6 Compatible) |
0.064" ± 0.007" | 316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 25 |
Zoom| Item # | Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SS8S050V | 1/2" (12.7 mm) | 5/64" | Ø0.04" (Ø1.1 mm) |
316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
Zoom| Item # | Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SS4MS12V | 12 mm (0.47") | 2 mm | Ø1.2 mm (Ø0.05") |
A4 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
Zoom| Item # | Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SS25S050V | 1/2" (12.7 mm) | 1/8" | Ø0.0625" (Ø1.6 mm) |
316 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SS25S075V | 3/4" (19.1 mm) |
Zoom| Item # | Length | Hex | Vent Hole | Material | Vacuum Compatibilitya | Outgassing Rate at 20 °C | Quantity |
|---|---|---|---|---|---|---|---|
| SS6MS12V | 12 mm (0.47") | 3 mm | Ø1.6 mm (Ø0.0625") |
A4 Stainless Steel | >10-6 Torr | 1.8 x 10-8 Torr-Liters/s/cm2 | 5 |
| SS6MS20V | 20 mm (0.79") |
Zoom| Specifications | |
|---|---|
| Vacuum Compatibility as Packageda |
>10-6 Torr |
| Materials | 2024-T3 Aluminum |
| Preparation and Packaging |
Chemically Cleaned and Double Vacuum Bagged |
| Aluminum Outgassing Rate at 20 °C |
7.6 x 10-9 Torr-Liters/s/cm2 |
| Maximum Torque | 28 in·lbs (3.2 N·m) |
The TS25HV and TS6HV/M are 1/4"-20 or M6 x 1.0-threaded for compatibility with our imperial or metric Vacuum-Compatible Ø1/2" Post Holders, respectively. Please note that we do not recommend using an L wrench hex key to tighten these thumbscrews, as this may break off the screw head. The recommended maximum torque is 28 in·lbs (3.2 N·m). We also offer standard spring-loaded thumbscrews.
TS25HV Drawing
Vacuum-Compatible Screws