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90AC999 — ADAPTER,WAVEGUIDE

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

90AC999: ADAPTER,WAVEGUIDE.

The ADAPTER,WAVEGUIDE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY SINGLE TUBING SEGMENT AND FLANGE, flange_depth: 0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM SINGLE FLANGE IN, flange_style: CHOKE TYPE SINGLE FLANGE, adapter_height: 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN, adapter_length: 1.300 INCHES MAXIMUM IN, style_designator: WAVEGUIDE TO COAXIAL. This part is cataloged in the U.S.

Government catalog under NSN 5985-01-367-9922, 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
90AC999
NSN: 5985-01-367-9922
FSC: 5985 — Antennas, Waveguides, and Related Equipment
CAGE: 01456 — MICROWAVE DEVELOPMENT LABORATORIES, INC. DBA MICROWAVE DEVELOPMENT LABORATORIES INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY SINGLE TUBING SEGMENT AND FLANGE
flange_depth0.610 INCHES MINIMUM AND 0.640 INCHES MAXIMUM SINGLE FLANGE IN
flange_styleCHOKE TYPE SINGLE FLANGE
adapter_height1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
adapter_length1.300 INCHES MAXIMUM IN
flange_quantity1
style_designatorWAVEGUIDE TO COAXIAL
surface_treatmentCHROMATE SINGLE TUBING SEGMENT AND FLANGE OUTSIDE SURFACES
operating_pressure15.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS
flange_inside_width0.896 INCHES MINIMUM AND 0.904 INCHES MAXIMUM SINGLE FLANGE IN
connector_end_designFEMALE
flange_inside_height0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM SINGLE FLANGE IN
NSN5985-01-367-9922
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available ADAPTER,WAVEGUIDE TITLE COMPONENT PN 90AC999 MFR ADAPTER,WAVEGUIDE
KEY FEATURES
•
TUBING WALL CONSTRUCTION STYLE: SEAMLESS SINGLE TUBING SEGMENT
•
FLANGE INSIDE HEIGHT: 0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM SINGLE FLANGE IN
•
FLANGE QUANTITY: 1
•
VOLTAGE STANDING WAVE RATIO: 1.10
•
ADAPTER OVERALL WIDTH: 1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: WAVEGUIDE TO COAXIAL
•
WAVEGUIDE INSIDE WIDTH: 0.996 INCHES MINIMUM AND 1.004 INCHES MAXIMUM IN
•
CONNECTOR END DESIGN: FEMALE
TECHNICAL CHARACTERISTICS
TUBING WALL CONSTRUCTION STYLESEAMLESS SINGLE TUBING SEGMENT
FLANGE INSIDE HEIGHT0.396 INCHES MINIMUM AND 0.404 INCHES MAXIMUM SINGLE FLANGE IN
FLANGE QUANTITY1
VOLTAGE STANDING WAVE RATIO1.10
ADAPTER OVERALL WIDTH1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM IN
STYLE DESIGNATORWAVEGUIDE TO COAXIAL
WAVEGUIDE INSIDE WIDTH0.996 INCHES MINIMUM AND 1.004 INCHES MAXIMUM IN
CONNECTOR END DESIGNFEMALE
CROSS-SECTIONAL SHAPE STYLEINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR
OPERATING PRESSURE15.0 POUNDS PER SQUARE INCH GAUGE (PSIG) MAXIMUM LBS
OTHER ITEMS IN FSC 5985 — Antennas, Waveguides, and Related Equipment
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5985-00-001-1854 5985-00-001-1862 5985-00-001-1869 5985-00-001-1870 5985-00-001-1871 5985-00-001-1874 5985-00-001-1875 5985-00-001-1876
SUBSTITUTES & CROSS-REFERENCES 2
1206987Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
5830009Same 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 90AC999?
90AC999 is a ADAPTER,WAVEGUIDE.
What parts can replace 90AC999?
There are 2 known substitutes for 90AC999: 1206987, 5830009. Substitute compatibility should be verified for your specific system.
What is the NSN for 90AC999?
90AC999 is cataloged in the U.S. Government catalog under NSN 5985-01-367-9922. 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.