PartsTable
Technical Data Sheet
Download PDF

18920PC3 — WINDOW,OBSERVATION

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

18920PC3: WINDOW,OBSERVATION.

The WINDOW,OBSERVATION is a the manufacturer industrial component. Key specifications include material: GLASS LAMINATE, surface_finish: POLISHED, overall_diameter: 3.610 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN, style_designator: CIRCULAR, overall_thickness: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN, material_transparency: CLEAR. This part is cataloged in the U.S.

Government catalog under NSN 9340-00-273-1820, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
18920PC3
NSN: 9340-00-273-1820
FSC: 9340 — Glass Fabricated Materials
CAGE: 01425 — LOUIS ALLIS CO THE THIS COMPANY HAS GONE BANKRUPT AND HAS BEEN PURCHASED BY 3 COMPANIES (USA)
SPECIFICATIONS
materialGLASS LAMINATE
surface_finishPOLISHED
overall_diameter3.610 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN
style_designatorCIRCULAR
overall_thickness0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
material_transparencyCLEAR
material_document_and_classificationMIL-G-3787,CLASS 1,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
NSN9340-00-273-1820
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available WINDOW,OBSERVATION TITLE COMPONENT PN 18920PC3 MFR WINDOW,OBSERVATION
KEY FEATURES
•
OVERALL DIAMETER: 3.610 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN
•
SURFACE FINISH: POLISHED
•
OVERALL THICKNESS: 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
•
MATERIAL TRANSPARENCY: CLEAR
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-3787,CLASS 1,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: GLASS LAMINATE
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER3.610 INCHES MINIMUM AND 3.640 INCHES MAXIMUM IN
SURFACE FINISHPOLISHED
OVERALL THICKNESS0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM IN
MATERIAL TRANSPARENCYCLEAR
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-3787,CLASS 1,TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALGLASS LAMINATE
SUBSTITUTES & CROSS-REFERENCES 1
PYREXReference document
Same NSN cross-reference
Reference document — Replaced / superseded reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
Ready to buy 18920PC3?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is 18920PC3?
18920PC3 is a WINDOW,OBSERVATION.
What parts can replace 18920PC3?
There is 1 known substitute for 18920PC3: PYREX. Substitute compatibility should be verified for your specific system.
What is the NSN for 18920PC3?
18920PC3 is cataloged in the U.S. Government catalog under NSN 9340-00-273-1820. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — 18920PC3

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.