The Transmitter,liquid Quantity, cataloged under National Stock Number 6680-01-035-5499, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Firstmark Aerospace Corp. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Transmitter,liquid Quantity |
| FSC / FSG | 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments (FSG 66) |
| Manufacturers | Firstmark Aerospace Corp (CAGE 3BMV1) |
| Parameter | Value |
|---|---|
| NSN | 6680-01-035-5499 |
| Primary Part Number | FG120P2 |
| Item Name | Transmitter,liquid Quantity |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Firstmark Aerospace Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| FG120P2 PRIMARY | Firstmark Aerospace Corp (USA) |
| Reference | Meaning |
|---|---|
| FG120P2 | 5/9 Secondary reference Honeywell International, Inc Dba Honeywell International Div Honeywell Energy Solutions Group |
| 10-3065-202 | 7/2 Vendor item drawing reference U.S. Government activity |
| 10-3065 | 5/1 Secondary reference U.S. Government activity |
NSN 6680-01-035-5499 is a Transmitter,liquid Quantity, manufactured by Firstmark Aerospace Corp, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-035-5499 has 1 manufacturer part number on file: FG120P2 (Firstmark Aerospace Corp).
2 possible matches (shared part number, not a government interchangeability claim): 2530-01-557-7126, 5995-01-574-4145. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6680-01-035-5499 has DEMIL Code Q. 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.