The Waveguide Assembly, cataloged under National Stock Number 5985-01-274-4134, 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 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-01-274-4134 |
| Primary Part Number | 2901444 |
| 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 |
| Tubing Wall Construction Style | SEAMLESS SINGLE TUBING SEGMENT |
| Flange Inside Height | 0.400 INCHES NOMINAL ALL FLANGES IN |
| Flange Quantity | 2 |
| Bend Angle in Deg | 90.0 SINGLE BEND H-PLANE |
| Style Designator | CORNER TYPE |
| Waveguide Offset Distance | 1.930 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 2.840 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 1.800 INCHES NOMINAL ALL FLANGES IN |
| Flange Connecting Hole Diameter | 0.251 INCHES NOMINAL SECOND FLANGE SECOND CONNECTION FACILITY IN |
| Flange Connecting Hole Diameter | 0.281 INCHES NOMINAL SECOND FLANGE FIRST CONNECTION FACILITY IN |
| Flange Inside Width | 2.840 INCHES NOMINAL ALL FLANGES IN |
| Thread Direction | RIGHT-HAND FIRST FLANGE ALL CONNECTION FACILITIES |
| Nominal Thread Size | 0.250 INCHES FIRST FLANGE ALL CONNECTION FACILITIES IN |
| Waveguide Outside Height | 0.560 INCHES NOMINAL IN |
| Waveguide Outside Width | 3.000 INCHES NOMINAL IN |
| Flange Depth | 0.310 INCHES NOMINAL ALL FLANGES IN |
| Flange Outside Width | 3.600 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Inside Height | 0.400 INCHES NOMINAL IN |
| Thread Class | 3B FIRST FLANGE ALL CONNECTION FACILITIES |
| Material | ALUMINUM SINGLE TUBING SEGMENT AND FLANGE |
| Flange Connecting Facility and Quantity | 2 UNTHREADED HOLE(S) SECOND FLANGE SECOND CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE FIRST CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 6 THREADED HOLE(S) FIRST FLANGE ALL CONNECTION FACILITIES |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST FLANGE ALL CONNECTION FACILITIES |
| Flange Style | CONTACT TYPE ALL FLANGES |
| Waveguide Longer Offset Distance | 12.105 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 2901444 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 55224 | 5/9 Secondary reference U.S. Government activity |
| 122361 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-274-4134 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 5985-01-274-4134 has 1 manufacturer part number on file: 2901444 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
2 possible matches (shared part number, not a government interchangeability claim): 5895-01-309-4749, 5340-01-481-8134. Verify interchangeability with system specifications before substitution.
Key specifications for 2901444: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 0.400 INCHES NOMINAL ALL FLANGES IN; Flange Quantity: 2; Bend Angle in Deg: 90.0 SINGLE BEND H-PLANE. 28 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.
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.