The Indicator,liquid Quantity, cataloged under National Stock Number 6680-01-693-6523, 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 Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | Indicator,liquid Quantity |
| FSC / FSG | 6680 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments (FSG 66) |
| Manufacturers | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc (CAGE 33321) |
| Parameter | Value |
|---|---|
| NSN | 6680-01-693-6523 |
| Primary Part Number | HIT-4U-3-AC-R-5-X-X-X-T-MIL |
| Item Name | Indicator,liquid Quantity |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| HIT-4U-3-AC-R-5-X-X-X-T-MIL PRIMARY | Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| HO3/4-6201 | D/9 Drawing number reference only Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc |
NSN 6680-01-693-6523 is a Indicator,liquid Quantity, manufactured by Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-693-6523 has 1 manufacturer part number on file: HIT-4U-3-AC-R-5-X-X-X-T-MIL (Hoffer Flow Controls Inc Dba Hoffer Flow Controls Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6680-01-693-6562, 6680-01-693-6610. 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.
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.