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MB4202-1 PC9 — WINDOW,OBSERVATION

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

MB4202-1 PC9: WINDOW,OBSERVATION.

The WINDOW,OBSERVATION is a the manufacturer industrial component. Key specifications include material: GLASS, overall_diameter: 4.875 INCHES NOMINAL IN, style_designator: CIRCULAR, overall_thickness: 0.250 INCHES NOMINAL IN, material_transparency: CLEAR. This part is cataloged in the U.S.

Government catalog under NSN 9340-01-164-5252, 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
MB4202-1 PC9
NSN: 9340-01-164-5252
FSC: 9340 — Glass Fabricated Materials
CAGE: 12763 — DYNALEC CORPORATION (USA)
SPECIFICATIONS
materialGLASS
overall_diameter4.875 INCHES NOMINAL IN
style_designatorCIRCULAR
overall_thickness0.250 INCHES NOMINAL IN
material_transparencyCLEAR
NSN9340-01-164-5252
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available WINDOW,OBSERVATION TITLE COMPONENT PN MB4202-1 PC9 MFR WINDOW,OBSERVATION
KEY FEATURES
•
OVERALL DIAMETER: 4.875 INCHES NOMINAL IN
•
OVERALL THICKNESS: 0.250 INCHES NOMINAL IN
•
MATERIAL TRANSPARENCY: CLEAR
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL: GLASS
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER4.875 INCHES NOMINAL IN
OVERALL THICKNESS0.250 INCHES NOMINAL IN
MATERIAL TRANSPARENCYCLEAR
STYLE DESIGNATORCIRCULAR
MATERIALGLASS
SUBSTITUTES & CROSS-REFERENCES 1
4L4Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is MB4202-1 PC9?
MB4202-1 PC9 is a WINDOW,OBSERVATION.
What parts can replace MB4202-1 PC9?
There is 1 known substitute for MB4202-1 PC9: 4L4. Substitute compatibility should be verified for your specific system.
What is the NSN for MB4202-1 PC9?
MB4202-1 PC9 is cataloged in the U.S. Government catalog under NSN 9340-01-164-5252. 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.