The Adapter,waveguide, cataloged under National Stock Number 5985-01-009-1434, is classified within Federal Supply Class 5985 (Antennas, Waveguides, and Related Equipment) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Caes Mission Systems Llc. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-009-1434 |
| Primary Part Number | MD80K40 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Caes Mission Systems Llc |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.253 INCHES MINIMUM AND 0.257 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Quantity | 2 |
| Nominal Thread Length | 0.325 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Nominal Thread Length | 1.000 INCHES SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Style Designator | WAVEGUIDE TO WAVEGUIDE |
| Flange Inside Diameter | 1.280 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Inside Width | 0.510 INCHES NOMINAL AND 0.622 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM FIRST FLANGE IN |
| Adapter Length | 1.195 INCHES MINIMUM AND 1.205 INCHES MAXIMUM IN |
| Flange Inside Width | 0.508 INCHES MINIMUM AND 0.512 INCHES MAXIMUM FIRST FLANGE IN |
| Thread Direction | RIGHT-HAND SECOND FLANGE ALL CONNECTION FACILITIES |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.138 INCHES SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Nominal Thread Size | 0.164 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.355 INCHES NOMINAL AND 0.391 INCHES NOMINAL IN |
| Waveguide Outside Width | 0.590 INCHES NOMINAL AND 0.702 INCHES NOMINAL IN |
| Flange Depth | 0.360 INCHES MINIMUM AND 0.390 INCHES MAXIMUM FIRST FLANGE IN |
| Flange Outside Width | 1.297 INCHES MINIMUM AND 1.327 INCHES MAXIMUM FIRST FLANGE IN |
| Waveguide Inside Height | 0.255 INCHES NOMINAL AND 0.311 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE ALL CONNECTION FACILITIES |
| Thread Class | 2B SECOND FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM ALLOY ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Connecting Facility and Quantity | 4 THREADED HOLE(S) SECOND FLANGE ALL CONNECTION FACILITIES |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) FIRST FLANGE ALL CONNECTION FACILITIES |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) SECOND FLANGE ALL CONNECTION FACILITIES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MD80K40 PRIMARY | Caes Mission Systems Llc (USA) |
| Reference | Meaning |
|---|---|
| 128SCAV651-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 128SCAV651-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 5985-01-009-1434 is a Adapter,waveguide, manufactured by Caes Mission Systems Llc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-009-1434 has 1 manufacturer part number on file: MD80K40 (Caes Mission Systems Llc).
Key specifications for MD80K40: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.253 INCHES MINIMUM AND 0.257 INCHES MAXIMUM FIRST FLANGE IN; Flange Quantity: 2. 29 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-01-009-1434 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.