The Waveguide Assembly, cataloged under National Stock Number 5985-01-274-5220, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 23 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-274-5220 |
| Primary Part Number | 2901561-1 |
| Item Name | Waveguide Assembly |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| FSC Application Data | ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.670 INCHES NOMINAL ALL FLANGES IN |
| Flange Quantity | 2 |
| Bend Angle in Deg | 90.0 FIRST BEND E-PLANE |
| Bend Angle in Deg | 45.0 SECOND BEND E-PLANE |
| Style Designator | OFFSET BEND TYPE |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 2.840 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 2.330 INCHES NOMINAL ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.255 INCHES MINIMUM AND 0.260 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES IN |
| Waveguide Center to Center Distance | 27.540 INCHES MINIMUM AND 27.780 INCHES MAXIMUM IN |
| Flange Inside Width | 2.840 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Length | 115.300 INCHES MINIMUM AND 115.540 INCHES MAXIMUM IN |
| Waveguide Outside Height | 0.830 INCHES NOMINAL IN |
| Waveguide Outside Width | 3.000 INCHES NOMINAL IN |
| Flange Depth | 0.310 INCHES NOMINAL ALL FLANGES IN |
| Flange Outside Width | 3.750 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Inside Height | 0.670 INCHES NOMINAL IN |
| Material | METAL ALL TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | CONTACT TYPE ALL FLANGES |
| 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 |
|---|---|
| 2901561-1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 55879-1 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-274-5220 is a Waveguide Assembly, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-274-5220 has 1 manufacturer part number on file: 2901561-1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2901561-1: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.670 INCHES NOMINAL ALL FLANGES IN; Flange Quantity: 2. 23 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 5985-01-274-5220 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.