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1026391 — WINDOW,OBSERVATION

✓ Government record, cited
3M · COMPONENT
PRODUCT OVERVIEW

1026391: WINDOW,OBSERVATION.

The WINDOW,OBSERVATION is a 3M industrial component. Key specifications include material: GLASS, overall_diameter: 0.480 INCHES NOMINAL IN, style_designator: CIRCULAR, overall_thickness: 0.118 INCHES NOMINAL IN, fsc_application_data: LASER MODEL NT-90L, supplementary_features: USED ON ENERGY MONITOR. This part is cataloged in the U.S.

Government catalog under NSN 9340-01-114-4723, 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
1026391
NSN: 9340-01-114-4723
FSC: 9340 — Glass Fabricated Materials
CAGE: 34860 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialGLASS
overall_diameter0.480 INCHES NOMINAL IN
style_designatorCIRCULAR
overall_thickness0.118 INCHES NOMINAL IN
fsc_application_dataLASER MODEL NT-90L
supplementary_featuresUSED ON ENERGY MONITOR
end_item_identificationAN/GVT-1 SIMULATED LASER TARGET
material_document_and_classificationRG-780 MFR REF SINGLE MATERIAL RESPONSE
NSN9340-01-114-4723
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: 3M WINDOW,OBSERVATION TITLE COMPONENT PN 1026391 MFR 3M WINDOW,OBSERVATION
KEY FEATURES
•
FSC APPLICATION DATA: LASER MODEL NT-90L
•
OVERALL DIAMETER: 0.480 INCHES NOMINAL IN
•
SUPPLEMENTARY FEATURES: USED ON ENERGY MONITOR
•
OVERALL THICKNESS: 0.118 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: RG-780 MFR REF SINGLE MATERIAL RESPONSE
•
MATERIAL: GLASS
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATALASER MODEL NT-90L
OVERALL DIAMETER0.480 INCHES NOMINAL IN
SUPPLEMENTARY FEATURESUSED ON ENERGY MONITOR
OVERALL THICKNESS0.118 INCHES NOMINAL IN
STYLE DESIGNATORCIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATIONRG-780 MFR REF SINGLE MATERIAL RESPONSE
END ITEM IDENTIFICATIONAN/GVT-1 SIMULATED LASER TARGET
MATERIALGLASS
OTHER ITEMS IN FSC 9340 — Glass Fabricated Materials
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
9340-00-001-2702 9340-00-001-3590 9340-00-001-3591 9340-00-001-3592 9340-00-003-0380 9340-00-003-1497 9340-00-003-1553 9340-00-003-7325
SUBSTITUTES & CROSS-REFERENCES 1
1026391-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1026391?
1026391 is a WINDOW,OBSERVATION manufactured by 3M.
What parts can replace 1026391?
There is 1 known substitute for 1026391: 1026391-1. Substitute compatibility should be verified for your specific system.
What is the NSN for 1026391?
1026391 is cataloged in the U.S. Government catalog under NSN 9340-01-114-4723. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.