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Vacuum-Compatible Screws


  • Vented Cap Screws, Vented Setscrews, and Thumbscrews for Vacuum Use
  • All Screws are Shipped Double Vacuum Bagged
  • Constructed of 316 and A4 Stainless Steel or 2024-T3 Aluminum

SS25S075V

1/4"-20 Vented Setscrews

SH25S063V

1/4"-20 Vented Cap Screws

TS25HV

Vacuum-Compatible
Thumbscrews

Related Items


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Cross Section of Vented ScrewClick to Enlarge
Vented screws allow trapped gases to escape while under vacuum.

Additional Vacuum-Compatible Components

Many of our other Optomechanical Components can be special ordered for vacuum use. Contact Tech Support for details.

Features

  • Vented 1/4"-20 and M6 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.

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 or the Specs 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 Breadboards, which may be used in vacuum applications after undergoing cleaning and processing by the end user.

Vacuum Compatibility Specs

ItemVented Cap Screws & WashersVented SetscrewsThumbscrews
Vacuum Compatibility as Packageda>10-6 Torr
Materials316 Stainless Steel (Imperial)
A4 Stainless Steel (Metric)
2024-T3 Aluminum
Preparation and PackagingChemically Cleaned and Double Vacuum Bagged
Aluminum / Stainless Steel Outgassing Rate at 20 °C1.8 x 10-8 Torr-Liters/s/cm27.6 x 10-9 Torr-Liters/s/cm2
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.

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.

Vented, Vacuum-Compatible Cap Screws

Vacuum Compatibility Specifications
Vacuum Compatibility
as Packageda
>10-6 Torr
Materials316 Stainless Steel (Imperial)
A4 Stainless Steel (Metric)
Preparation and
Packaging
Chemically Cleaned and
Double Vacuum Bagged
Stainless Steel
Outgassing Rate at 20 °C
1.8 x 10-8 Torr-Liters/s/cm2
  • Pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.
Vented Cap Screw
Click to Enlarge

These Cap Screws have a Central Ø0.0625" (Ø1.6 mm) Vent
  • 1/4"-20 and M6 x 1.0 Cap Screws with Vents for Vacuum Applications
  • Constructed of 316 or A4 Stainless Steel
  • Vacuum-Compatible Design (>10-6 Torr)
  • Double Vacuum Bagged for Cleanroom Environments
  • We Also Offer Standard Cap Screws in a Variety of Sizes

These cap screws and washers are constructed from 316 or A4 stainless steel. They have a central Ø0.0625” (Ø1.6 mm) hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

Item #LengthHexMaterialQuantity
SH25S038V3/8" (9.5 mm)3/16"316 Stainless Steel5
SH25S050V1/2" (12.7 mm)5
SH25S063V5/8" (15.9 mm)5
SH25S075V3/4" (19.1 mm)5
SH25S100V1" (25.4 mm)5
SH6MS10V10 mm (0.39")5 mmA4 Stainless Steel5
SH6MS12V12 mm (0.47")5
SH6MS16V16 mm (0.63")5
SH6MS20V20 mm (0.79")5
SH6MS25V25 mm (0.98")5
W25S050V1/4" Washer (M6 Compatible)316 Stainless Steel25
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SH25S038V Support Documentation
SH25S038V1/4"-20 Vacuum-Compatible Vented Cap Screw, 316 Stainless, 3/8” Long, 5 Pack
$10.29
Today
SH25S050V Support Documentation
SH25S050V1/4"-20 Vacuum-Compatible Vented Cap Screw, 316 Stainless, 1/2” Long, 5 Pack
$11.99
Today
SH25S063V Support Documentation
SH25S063V1/4"-20 Vacuum-Compatible Vented Cap Screw, 316 Stainless, 5/8” Long, 5 Pack
$12.51
Today
SH25S075V Support Documentation
SH25S075V1/4"-20 Vacuum-Compatible Vented Cap Screw, 316 Stainless, 3/4” Long, 5 Pack
$14.64
Today
SH25S100V Support Documentation
SH25S100V1/4"-20 Vacuum-Compatible Vented Cap Screw, 316 Stainless, 1” Long, 5 Pack
$21.12
Today
+1 Qty Docs Part Number - Universal Price Available
W25S050V Support Documentation
W25S050V1/4" (M6) Vacuum-Compatible Washer, 316 Stainless, 25 Pack
$7.51
Today
+1 Qty Docs Part Number - Metric Price Available
SH6MS10V Support Documentation
SH6MS10VM6 x 1.0 Vacuum-Compatible Vented Cap Screw, A4 Stainless, 10 mm Long, 5 Pack
$7.58
Today
SH6MS12V Support Documentation
SH6MS12VM6 x 1.0 Vacuum-Compatible Vented Cap Screw, A4 Stainless, 12 mm Long, 5 Pack
$12.63
Today
SH6MS16V Support Documentation
SH6MS16VM6 x 1.0 Vacuum-Compatible Vented Cap Screw, A4 Stainless, 16 mm Long, 5 Pack
$13.58
Today
SH6MS20V Support Documentation
SH6MS20VM6 x 1.0 Vacuum-Compatible Vented Cap Screw, A4 Stainless, 20 mm Long, 5 Pack
$17.19
Today
SH6MS25V Support Documentation
SH6MS25VM6 x 1.0 Vacuum-Compatible Vented Cap Screw, A4 Stainless, 25 mm Long, 5 Pack
$24.40
Today

Vented, Vacuum-Compatible Setscrews

Vacuum Compatibility Specifications
Vacuum Compatibility
as Packageda
>10-6 Torr
Materials316 Stainless Steel (Imperial)
A4 Stainless Steel (Metric)
Preparation and
Packaging
Chemically Cleaned and
Double Vacuum Bagged
Stainless Steel
Outgassing Rate at 20 °C
1.8 x 10-8 Torr-Liters/s/cm2
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.
Vented Cap Screw
Click to Enlarge

These Setscrews Have a Central Ø0.0625" (Ø1.6 mm) Vent
  • 1/4"-20 and M6 x 1.0 Setscrews with Vents for Vacuum Applications
  • Constructed of 316 or A4 Stainless Steel
  • Vacuum-Compatible Design (>10-6 Torr)
  • Double Vacuum Bagged for Cleanroom Environments
  • We Also Offer Standard Setscrews in a Variety of Sizes

These setscrews are constructed from 316 or A4 stainless steel. They have a central Ø0.0625” (Ø1.6 mm) hole through the body of the screw to serve as a vent, allowing trapped gas to escape from a blind hole when a vacuum chamber is pumped down.

Item #LengthHexMaterialQuantity
SS25S050V1/2"1/8"316 Stainless Steel5
SS25S075V3/4"5
SS6MS12V12 mm3 mmA4 Stainless Steel5
SS6MS20V20 mm5
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
SS25S050V Support Documentation
SS25S050V1/4"-20 Vacuum-Compatible Vented Setscrew, 316 Stainless, 1/2" Long, 5 Pack
$12.00
Today
SS25S075V Support Documentation
SS25S075V1/4"-20 Vacuum-Compatible Vented Setscrew, 316 Stainless, 3/4" Long, 5 Pack
$12.50
Today
+1 Qty Docs Part Number - Metric Price Available
SS6MS12V Support Documentation
SS6MS12VM6 x 1.0 Vacuum-Compatible Vented Setscrew, A4 Stainless, 12 mm Long, 5 Pack
$12.00
5-8 Days
SS6MS20V Support Documentation
SS6MS20VM6 x 1.0 Vacuum-Compatible Vented Setscrew, A4 Stainless, 20 mm Long, 5 Pack
$12.50
Today

Vacuum-Compatible Thumbscrews

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)
  • This is the pressure at which these components can be used with no additional processing. They can be used at even lower pressures with additional cleaning and processing.

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 Mechanical Drawing
TS25HV Drawing
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
TS25HV Support Documentation
TS25HV3/16" Hex-Locking Thumbscrew, 1/4"-20 Thread, Vacuum Compatible
$10.95
Today
+1 Qty Docs Part Number - Metric Price Available
TS6HV/M Support Documentation
TS6HV/M5 mm Hex-Locking Thumbscrew, M6 x 1.0 Thread, Vacuum Compatible
$10.61
Today
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