The Adapter,waveguide, cataloged under National Stock Number 5985-01-478-1126, 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 Teledyne Etm, Inc. Dba Etm Electromatic Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5985-01-478-1126 |
| Primary Part Number | E20521-000 |
| Item Name | Adapter,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Teledyne Etm, Inc. Dba Etm Electromatic Inc |
| Status | ACTIVE |
| Flange Quantity | 1 |
| Style Designator | WAVEGUIDE TO COAXIAL |
| Adapter Length | 2.500 INCHES MAXIMUM IN |
| Material | COPPER ALLOY SINGLE FLANGE |
| Flange Connecting Facility and Quantity | 4 UNTHREADED HOLE(S) SINGLE FLANGE ALL CONNECTION FACILITIES |
| Flange Style | CHOKE TYPE SINGLE 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 |
|---|---|
| E20521-000 PRIMARY | Teledyne Etm, Inc. Dba Etm Electromatic Inc (USA) |
| Reference | Meaning |
|---|---|
| 98-20521 | D/9 Drawing number reference only Teledyne Etm, Inc. Dba Etm Electromatic Inc |
NSN 5985-01-478-1126 is a Adapter,waveguide, manufactured by Teledyne Etm, Inc. Dba Etm Electromatic Inc, classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-01-478-1126 has 1 manufacturer part number on file: E20521-000 (Teledyne Etm, Inc. Dba Etm Electromatic Inc).
Key specifications for E20521-000: Flange Quantity: 1; Style Designator: WAVEGUIDE TO COAXIAL; Adapter Length: 2.500 INCHES MAXIMUM IN; Special Features: MATERIAL OFHC COPPER, FLANGES-BRASS. 6 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 5985-01-478-1126 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.