The Waveguide Assembly, cataloged under National Stock Number 5985-01-053-4124, 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 2 manufacturer part numbers 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 | 5985-01-053-4124 |
| Primary Part Number | 2920187 |
| 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 | 1.750 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Height | 1.750 INCHES NOMINAL SECOND FLANGE IN |
| Flange Quantity | 2 |
| Bend Angle in Deg | 90.0 SINGLE BEND E-PLANE |
| Style Designator | BEND TYPE |
| Waveguide Offset Distance | 4.156 INCHES NOMINAL IN |
| Flexibility | RIGID SINGLE TUBING SEGMENT |
| Waveguide Inside Width | 3.250 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | INTERNAL, RECTANGULAR EXTERNAL, RECTANGULAR |
| Flange Outside Height | 2.250 INCHES NOMINAL SECOND FLANGE IN |
| Flange Connecting Hole Diameter | 0.250 INCHES NOMINAL ALL FLANGES SINGLE CONNECTION FACILITY IN |
| Flange Inside Width | 3.250 INCHES NOMINAL FIRST FLANGE IN |
| Flange Inside Width | 3.250 INCHES NOMINAL SECOND FLANGE IN |
| Waveguide Outside Height | 2.000 INCHES NOMINAL IN |
| Waveguide Outside Width | 3.500 INCHES NOMINAL IN |
| Flange Depth | 0.375 INCHES NOMINAL FIRST FLANGE IN |
| Flange Depth | 1.500 INCHES NOMINAL SECOND FLANGE IN |
| Flange Outside Width | 3.750 INCHES NOMINAL SECOND FLANGE IN |
| Surface Treatment | ENAMEL ALL FLANGE OUTSIDE SURFACES |
| Waveguide Inside Height | 1.750 INCHES NOMINAL IN |
| Material | COPPER ALLOY SINGLE TUBING SEGMENT |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SECOND FLANGE SINGLE CONNECTION FACILITY |
| Flange Connecting Facility and Quantity | 6 UNTHREADED HOLE(S) FIRST FLANGE SINGLE CONNECTION FACILITY |
| Flange Outside Diameter | 5.000 INCHES NOMINAL FIRST FLANGE IN |
| Flange Style | COVER TYPE FIRST FLANGE |
| Flange Style | CONTACT TYPE SECOND FLANGE |
| Waveguide Longer Offset Distance | 5.656 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 |
NSN 5985-01-053-4124 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 5985-01-053-4124 has 2 manufacturer part numbers on file: 2920187 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 2920187 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-571-1457. Verify interchangeability with system specifications before substitution.
Key specifications for 2920187: Tubing Wall Construction Style: SEAMLESS SINGLE TUBING SEGMENT; Flange Inside Height: 1.750 INCHES NOMINAL FIRST FLANGE IN; Flange Inside Height: 1.750 INCHES NOMINAL SECOND FLANGE IN; Flange Quantity: 2. 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.