The Waveguide Assembly, cataloged under National Stock Number 5985-00-444-0403, 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 | 5985-00-444-0403 |
| Primary Part Number | 135109-2 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | L3harris Technologies, Inc Div Space & Airborne Systems |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | BELLOWS SECOND TUBING SEGMENT |
| Tubing Wall Construction Style | NULL-POINT SEAM FIRST TUBING SEGMENT |
| Flange Inside Height | 1.502 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Height | 1.502 INCHES NOMINAL FIRST FLANGE IN |
| Flange Quantity | 2 |
| Voltage Standing Wave Ratio | 1.08 |
| Style Designator | STRAIGHT TYPE |
| Flexibility | FLEXIBLE SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 2.834 INCHES MINIMUM AND 2.846 INCHES MAXIMUM IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 3.000 INCHES NOMINAL SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.263 INCHES NOMINAL SECOND FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Connecting Hole Diameter | 0.286 INCHES NOMINAL FIRST FLANGE SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 3.002 INCHES NOMINAL SECOND FLANGE IN |
| Flange Inside Width | 3.002 INCHES NOMINAL FIRST FLANGE IN |
| Waveguide Length | 7.800 INCHES NOMINAL IN |
| Waveguide Outside Height | 1.494 INCHES MINIMUM AND 1.506 INCHES MAXIMUM IN |
| Waveguide Outside Width | 2.994 INCHES MINIMUM AND 3.006 INCHES MAXIMUM IN |
| Flange Depth | 0.750 INCHES NOMINAL SECOND FLANGE IN |
| Flange Depth | 0.750 INCHES NOMINAL FIRST FLANGE IN |
| Flange Outside Width | 4.500 INCHES NOMINAL SECOND FLANGE IN |
| Insertion Loss in Decibels | 0.06 |
| Waveguide Inside Height | 1.334 INCHES MINIMUM AND 1.346 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 10 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY |
| Flange Outside Diameter | 5.312 INCHES NOMINAL FIRST FLANGE IN |
| Flange Style | COVER TYPE FIRST FLANGE |
| Flange Style | CONTACT TYPE SECOND 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 |
|---|---|
| 135109-2 PRIMARY | L3harris Technologies, Inc Div Space & Airborne Systems (USA) |
NSN 5985-00-444-0403 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 5985-00-444-0403 has 1 manufacturer part number on file: 135109-2 (L3harris Technologies, Inc Div Space & Airborne Systems).
1 possible match (shared part number, not a government interchangeability claim): 8145-01-615-2556. Verify interchangeability with system specifications before substitution.
Key specifications for 135109-2: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: BELLOWS SECOND TUBING SEGMENT; Tubing Wall Construction Style: NULL-POINT SEAM FIRST TUBING SEGMENT; Flange Inside Height: 1.502 INCHES NOMINAL SECOND FLANGE IN. 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 5985-00-444-0403 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.