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20μm Aperture Diameter, Mounted, Precision Pinhole

20µm Aperture Diameter, Mounted, Precision Pinhole, #56-279

Stock #56-279 3-4 days
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Outer Diameter (mm):
25 +0.4/-0.000
Stainless Steel
Fixed Aperture Diameter (μm):
Thickness (mm):
0.01 Nominal
Aperture Tolerance (µm):
Mount Thickness (mm):
1.25 ±0.05
Aperture Centration (µm):

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 235:

Product Family Description

  • Available in Aperture Mounts for a Secure Mechanical Support
  • Pinhole Sized Ranging from 1 to 1,000 Microns
  • High Power Apertures Available

Unmounted Precision Pinholes

Precision Pinholes are high quality apertures centered to ±0.002" (50 microns). They are constructed of stainless steel and are 3/8" (9.5mm) in diameter. Smaller diameter pinholes will reduce energy throughput, while larger diameter pinholes will pass more spatial noise.  Precision pinholes have sizes ranging from 1 to 1,000 microns. Typical applications include leak detection, aerosol studies, holography, fiber optics guides, spatial filtering, research, and more. 

Use the Precision Pinhole Mount to integrate unmounted pinholes into a variety of mechanical components easily.  

Mounted Precision Pinholes

Precision Pinholes are available in aperture mounts for secure mechanical support. The mounts also fit into various optical assemblies. Each 9.5mm diameter pinhole is sealed within a 25mm diameter black-anodized aluminum mount. The mount is clearly labeled with a pinhole aperture diameter for easy identification. 

Note: Aperture Centering to Mount ±125 microns.