The Switch,waveguide, cataloged under National Stock Number 5985-00-919-1840, 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 Frontgrade Technologies Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5985-00-919-1840 |
| Primary Part Number | 890423 |
| Item Name | Switch,waveguide |
| FSC / FSG | 5985 / 59 — Antennas, Waveguides, and Related Equipment |
| Manufacturer | Frontgrade Technologies Inc. |
| Status | ACTIVE |
| Overall Diameter | 4.590 INCHES NOMINAL IN |
| Actuator Voltage in Volts | 24.0 MINIMUM AND 29.0 MAXIMUM |
| Coupling Position Quantity | 3 |
| Actuator Operating Method | RELAY |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 890423 PRIMARY | Frontgrade Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 890423 | 5/9 Secondary reference U.S. Government activity |
| 890423 | 5/9 Secondary reference Atlantic Microwave Corporation Div Cobham Electronic Systems |
NSN 5985-00-919-1840 is a Switch,waveguide, manufactured by Frontgrade Technologies Inc., classified under FSC 5985, Antennas, Waveguides, and Related Equipment. Status: active.
NSN 5985-00-919-1840 has 1 manufacturer part number on file: 890423 (Frontgrade Technologies Inc.).
Key specifications for 890423: Overall Diameter: 4.590 INCHES NOMINAL IN; Actuator Voltage in Volts: 24.0 MINIMUM AND 29.0 MAXIMUM; Overall Length: 5.770 INCHES NOMINAL IN; Coupling Position Quantity: 3. 4 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 5985-00-919-1840 has DEMIL Code B. 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.