The Waveguide Assembly, cataloged under National Stock Number 5985-01-072-9979, 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 L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 30 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-072-9979 |
| Primary Part Number | 140821-1 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | L3harris Technologies, Inc Div Space & Airborne Systems |
| Status | ACTIVE |
| Tubing Wall Construction Style | SEAMLESS ALL TUBING SEGMENTSEAMLESS ALL TUBING SEGMENT |
| Flange Inside Height | 0.497 INCHES NOMINAL FIRST FLANGE0.497 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 0.633 INCHES MAXIMUM SECOND FLANGE0.633 INCHES MAXIMUM SECOND FLANGE IN |
| Flange Quantity | 22 |
| Voltage Standing Wave Ratio | 1.161.16 |
| Style Designator | OFFSET BEND TYPE |
| Flexibility | RIGID ALL TUBING SEGMENT |
| Waveguide Inside Width | 1.122 INCHES NOMINAL1.122 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULARINTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.875 INCHES NOMINAL FIRST FLANGE1.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Height | 1.875 INCHES NOMINAL SECOND FLANGE1.875 INCHES NOMINAL SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.172 INCHES MAXIMUM SECOND FLANGE ALL CONNECTION FACILITIES0.172 INCHES MAXIMUM SECOND FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Center to Center Distance | 1.250 INCHES NOMINAL IN |
| Flange Inside Width | 1.312 INCHES NOMINAL SECOND FLANGE1.312 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Width | 1.122 INCHES NOMINAL FIRST FLANGE1.122 INCHES NOMINAL FIRST FLANGE IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIESRIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Waveguide Length | 10.066 INCHES NOMINAL IN |
| Nominal Thread Size | 0.164 INCHES FIRST FLANGE ALL CONNECTION FACILITIES0.164 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.625 INCHES NOMINAL0.625 INCHES NOMINAL IN |
| Waveguide Outside Width | 1.250 INCHES NOMINAL1.250 INCHES NOMINAL IN |
| Flange Depth | 0.438 INCHES NOMINAL SECOND FLANGE0.438 INCHES NOMINAL SECOND FLANGE IN |
| Flange Depth | 0.625 INCHES NOMINAL FIRST FLANGE0.625 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 1.875 INCHES NOMINAL FIRST FLANGE1.875 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 1.875 INCHES NOMINAL SECOND FLANGE1.875 INCHES NOMINAL SECOND FLANGE IN |
| Insertion Loss in Decibels | 0.200.20 |
| Waveguide Inside Height | 0.497 INCHES NOMINAL0.497 INCHES NOMINAL IN |
| Thread Class | 2B FIRST FLANGE ALL CONNECTION FACILITIES2B FIRST FLANGE ALL CONNECTION FACILITIES |
| Thread Quantity Per Inch | 32 FIRST FLANGE ALL CONNECTION FACILITIES32 FIRST FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM ALLOY 1100 ALL TUBING SEGMENT |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 140821-1 PRIMARY | L3harris Technologies, Inc Div Space & Airborne Systems (USA) |
NSN 5985-01-072-9979 is a Waveguide Assembly, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-072-9979 has 1 manufacturer part number on file: 140821-1 (L3harris Technologies, Inc Div Space & Airborne Systems).
1 possible match (shared part number, not a government interchangeability claim): 5940-01-317-7060. Verify interchangeability with system specifications before substitution.
Key specifications for 140821-1: Tubing Wall Construction Style: SEAMLESS ALL TUBING SEGMENTSEAMLESS ALL TUBING SEGMENT; Flange Inside Height: 0.497 INCHES NOMINAL FIRST FLANGE0.497 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 0.633 INCHES MAXIMUM SECOND FLANGE0.633 INCHES MAXIMUM SECOND FLANGE IN; Flange Quantity: 22. 30 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5985-01-072-9979 has DEMIL Code D. 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.