The Glass,liquid Sight Indicator,fla, cataloged under National Stock Number 6680-01-475-0025, 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 Norgren C a Co. Government technical data includes 4 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 | 6680-01-475-0025 |
| Primary Part Number | 4321-89 |
| Item Name | Glass,liquid Sight Indicator,fla |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Norgren C a Co |
| Status | ACTIVE |
| Design Type | PLAIN |
| Gage Rated Pressure | 250.0 POUNDS PER SQUARE INCH LBS |
| Mica Shield | PROVIDED |
| Gasket | NOT INCLUDED |
| 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 |
|---|---|
| B74G-6AK-AD3-RMG ITEM 47 | Norgren C a Co (USA) |
| 4321-89 PRIMARY | Norgren C a Co (USA) |
NSN 6680-01-475-0025 is a Glass,liquid Sight Indicator,fla, manufactured by Norgren C a Co, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-475-0025 has 2 manufacturer part numbers on file: B74G-6AK-AD3-RMG ITEM 47 (Norgren C a Co), 4321-89 (Norgren C a Co).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-550-7134. Verify interchangeability with system specifications before substitution.
Key specifications for 4321-89: Design Type: PLAIN; Gage Rated Pressure: 250.0 POUNDS PER SQUARE INCH LBS; Overall Length: 72.900 INCHES NOMINAL IN; Overall Width: 0.500 INCHES NOMINAL IN. 4 specifications are documented in the U.S. Government catalog.
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.