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278423PC21 — FILTER,LIGHT,OPTICAL INSTRUMENT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

278423PC21: FILTER,LIGHT,OPTICAL INSTRUMENT.

FILTER,LIGHT,OPTICAL INSTRUMENT. Key specifications include material: GLASS SURFACE, overall_diameter: 1.300 INCHES NOMINAL IN, special_features: COLOR CLEAR, overall_thickness: 0.236 INCHES NOMINAL IN, density_variability: NOT VARIABLE, end_item_identification: RANGEFINDER MK46. This part is cataloged in the U.S.

Government catalog under NSN 1240-00-025-0205, 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
278423PC21
NSN: 1240-00-025-0205
FSC: 1240 — Optical Sighting and Ranging Equipment
CAGE: 10001 — NAVAIR AND NAVSEA MANAGED ORIGINAL DESIGN ACTIVITY DWG NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
materialGLASS SURFACE
overall_diameter1.300 INCHES NOMINAL IN
special_featuresCOLOR CLEAR
overall_thickness0.236 INCHES NOMINAL IN
density_variabilityNOT VARIABLE
end_item_identificationRANGEFINDER MK46
viewing_surface_overall_diameter1.280 INCHES NOMINAL IN
NSN1240-00-025-0205
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FILTER,LIGHT,OPTICAL INSTRUMENT TITLE COMPONENT PN 278423PC21 MFR FILTER,LIGHT,OPTICAL I
KEY FEATURES
•
OVERALL DIAMETER: 1.300 INCHES NOMINAL IN
•
OVERALL THICKNESS: 0.236 INCHES NOMINAL IN
•
VIEWING SURFACE OVERALL DIAMETER: 1.280 INCHES NOMINAL IN
•
DENSITY VARIABILITY: NOT VARIABLE
•
MATERIAL: GLASS SURFACE
TYPICAL APPLICATIONS
  • Data center switch-to-switch interconnects
  • Server-to-storage fabric connectivity
  • Long-distance fiber optic links
  • High-speed uplink connections (10G/25G/40G/100G)
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER1.300 INCHES NOMINAL IN
OVERALL THICKNESS0.236 INCHES NOMINAL IN
VIEWING SURFACE OVERALL DIAMETER1.280 INCHES NOMINAL IN
SPECIAL FEATURESCOLOR CLEAR
END ITEM IDENTIFICATIONRANGEFINDER MK46
DENSITY VARIABILITYNOT VARIABLE
MATERIALGLASS SURFACE
OTHER ITEMS IN FSC 1240 — Optical Sighting and Ranging Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
1240-00-000-0160 1240-00-001-4014 1240-00-001-4015 1240-00-001-4488 1240-00-003-1076 1240-00-003-8404 1240-00-003-8405 1240-00-003-8406
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — mutilation + specific procedure
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FREQUENTLY ASKED QUESTIONS
What is 278423PC21?
278423PC21 is a FILTER,LIGHT,OPTICAL INSTRUMENT.
What is the NSN for 278423PC21?
278423PC21 is cataloged in the U.S. Government catalog under NSN 1240-00-025-0205. 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.