The Waveguide Assembly, cataloged under National Stock Number 5985-01-274-1457, 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 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5985-01-274-1457 |
| Primary Part Number | 3258288 |
| 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 | BELLOWS ALL TUBING SEGMENT |
| Flange Inside Height | 0.670 INCHES NOMINAL ALL FLANGES IN |
| Flange Quantity | 2 |
| Precious Material | SILVER |
| Voltage Standing Wave Ratio | 1.12 |
| Waveguide First Leg Length | 2.000 INCHES MINIMUM IN |
| Waveguide Second Leg Length | 15.800 INCHES MAXIMUM IN |
| Style Designator | FOUR BEND TYPE |
| Flexibility | FLEXIBLE ALL TUBING SEGMENT |
| Waveguide Inside Width | 2.837 INCHES MINIMUM AND 2.843 INCHES MAXIMUM 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 |
| Flange Inside Width | 2.840 INCHES NOMINAL ALL FLANGES IN |
| Waveguide Fourth Leg Length | 15.800 INCHES MAXIMUM IN |
| Waveguide Fifth Leg Length | 2.000 INCHES MINIMUM 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 |
| Surface Treatment | PAINT ALL FLANGE OUTSIDE SURFACES |
| Surface Treatment | SILVER ALL TUBING SEGMENT INSIDE SURFACES |
| Precious Material and Location | INTERNAL SURFACES SILVER |
| Waveguide Inside Height | 0.667 INCHES MINIMUM AND 0.673 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY ALL FLANGE |
| Flange Connecting Facility and Quantity | 8 UNTHREADED HOLE(S) ALL FLANGES ALL CONNECTION FACILITIES |
| Flange Style | CONTACT TYPE ALL FLANGES |
| Waveguide Third Leg Length | 3.590 INCHES NOMINAL IN |
| 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 |
|---|---|
| 122517-1 | Frontgrade Technologies Inc. (USA) |
| 3258288 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 122517-1 | 5/9 Secondary reference U.S. Government activity |
| 122517 | 5/9 Secondary reference U.S. Government activity |
NSN 5985-01-274-1457 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 5985-01-274-1457 has 2 manufacturer part numbers on file: 122517-1 (Frontgrade Technologies Inc.), 3258288 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-317-4255. Verify interchangeability with system specifications before substitution.
Key specifications for 3258288: FSC Application Data: ANTENNAS,WAVEGUIDES,AND RELATED EQUIPMENT; Tubing Wall Construction Style: BELLOWS ALL TUBING SEGMENT; Flange Inside Height: 0.670 INCHES NOMINAL ALL FLANGES IN; Flange Quantity: 2. 29 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 5985-01-274-1457 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.