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55-2181 ✓ 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 WAVEGUIDE ASSEMBLY is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE, flexibility: RIGID ALL TUBING SEGMENT, flange_depth: 0.280 INCHES MINIMUM AND 0.340 INCHES MAXIMUM ALL FLANGES IN, flange_style: CONTACT TYPE ALL FLANGES, style_designator: CORNER TYPE, flange_outside_width: 3.000 INCHES NOMINAL ALL FLANGES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-01-274-1453, 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
55-2181
NSN: 5985-01-274-1453
FSC: 5985
CAGE: 96341 — COBHAM ADVANCED ELECTRONIC SOLUTIONS INC. (USA)
SPECIFICATIONS
materialALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE
flexibilityRIGID ALL TUBING SEGMENT
flange_depth0.280 INCHES MINIMUM AND 0.340 INCHES MAXIMUM ALL FLANGES IN
flange_styleCONTACT TYPE ALL FLANGES
flange_quantity2
style_designatorCORNER TYPE
flange_outside_width3.000 INCHES NOMINAL ALL FLANGES IN
fsc_application_dataANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
flange_outside_height3.600 INCHES NOMINAL ALL FLANGES IN
waveguide_inside_width2.837 INCHES MINIMUM AND 2.843 INCHES MAXIMUM IN
end_item_identificationWET VALVE HYDRO TEST ASSEMBLY
waveguide_inside_height0.397 INCHES MINIMUM AND 0.403 INCHES MAXIMUM IN
NSN5985-01-274-1453
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available WAVEGUIDE ASSEMBLY TITLE COMPONENT PN 55-2181 MFR WAVEGUIDE ASSEMBLY
KEY FEATURES
•
WAVEGUIDE OFFSET DISTANCE: 1.560 INCHES NOMINAL IN
•
TUBING WALL CONSTRUCTION STYLE: SEAMLESS ALL TUBING SEGMENT
•
FLEXIBILITY: RIGID ALL TUBING SEGMENT
•
FLANGE OUTSIDE WIDTH: 3.000 INCHES NOMINAL ALL FLANGES IN
•
MATERIAL: ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE
•
FLANGE QUANTITY: 2
•
FLANGE OUTSIDE HEIGHT: 3.600 INCHES NOMINAL ALL FLANGES IN
•
FLANGE CONNECTING HOLE DIAMETER: 0.281 INCHES NOMINAL ALL FLANGES ALL CONNECTION FACILITIES IN
TECHNICAL CHARACTERISTICS (FLIS)
WAVEGUIDE OFFSET DISTANCE1.560 INCHES NOMINAL IN
TUBING WALL CONSTRUCTION STYLESEAMLESS ALL TUBING SEGMENT
FLEXIBILITYRIGID ALL TUBING SEGMENT
FLANGE OUTSIDE WIDTH3.000 INCHES NOMINAL ALL FLANGES IN
MATERIALALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE
FLANGE QUANTITY2
FLANGE OUTSIDE HEIGHT3.600 INCHES NOMINAL ALL FLANGES IN
FLANGE CONNECTING HOLE DIAMETER0.281 INCHES NOMINAL ALL FLANGES ALL CONNECTION FACILITIES IN
WAVEGUIDE LONGER OFFSET DISTANCE4.560 INCHES NOMINAL IN
FSC APPLICATION DATAANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
FF5032Interchangeable
interchangeable cross-reference
interchangeable
2910001255600Interchangeable
interchangeable cross-reference
interchangeable
122B325Interchangeable
interchangeable cross-reference
interchangeable
302379500Interchangeable
interchangeable cross-reference
interchangeable
122325Interchangeable
interchangeable cross-reference
interchangeable
3023795Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 55-2181?
55-2181 is a WAVEGUIDE ASSEMBLY.
What parts can replace 55-2181?
There are 12 known substitutes for 55-2181: FF5032, 2910001255600, 122B325 and 9 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 55-2181?
55-2181 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5985-01-274-1453. 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