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PartsTable / COMPONENT / 406891-1
406891-1 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The WINDOW,OBSERVATION is a the manufacturer industrial component. Key specifications include material: PLASTIC, overall_diameter: 11.062 INCHES NOMINAL IN, style_designator: CIRCULAR, overall_thickness: 0.500 INCHES NOMINAL IN, material_transparency: CLEAR. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 9340-00-623-2371, 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
406891-1
NSN: 9340-00-623-2371
FSC: 9340
CAGE: 96214 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialPLASTIC
ply_quantity1
overall_diameter11.062 INCHES NOMINAL IN
style_designatorCIRCULAR
overall_thickness0.500 INCHES NOMINAL IN
material_transparencyCLEAR
NSN9340-00-623-2371
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available WINDOW,OBSERVATION TITLE COMPONENT PN 406891-1 MFR WINDOW,OBSERVATION
KEY FEATURES
•
OVERALL DIAMETER: 11.062 INCHES NOMINAL IN
•
MATERIAL: PLASTIC
•
STYLE DESIGNATOR: CIRCULAR
•
MATERIAL TRANSPARENCY: CLEAR
•
PLY QUANTITY: 1
•
OVERALL THICKNESS: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL DIAMETER11.062 INCHES NOMINAL IN
MATERIALPLASTIC
STYLE DESIGNATORCIRCULAR
MATERIAL TRANSPARENCYCLEAR
PLY QUANTITY1
OVERALL THICKNESS0.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
D-42085PC20Interchangeable
interchangeable cross-reference
interchangeable
PX1-2-14Interchangeable
interchangeable cross-reference
interchangeable
MIL-P-17577 STY L 1 .25INInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 406891-1?
406891-1 is a WINDOW,OBSERVATION.
What parts can replace 406891-1?
There are 3 known substitutes for 406891-1: D-42085PC20, PX1-2-14, MIL-P-17577 STY L 1 .25IN. Substitute compatibility should be verified for your specific system.
What is the NSN for 406891-1?
406891-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 9340-00-623-2371. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026