The Thermo-Hydrometer,a, cataloged under National Stock Number 4920-01-478-6322, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-478-6322 |
| Item Name | Thermo-Hydrometer,a |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Status | ACTIVE |
| Overall Diameter | 34.0 MILLIMETERS MINIMUM AND 58.0 MILLIMETERS MAXIMUM MM |
| 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 |
| Reference | Meaning |
|---|---|
| TH/M625 | 3/9 Design control — primary reference Controlled Environment Packaging, Inc. |
NSN 4920-01-478-6322 is a Thermo-Hydrometer,a, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
Key specifications for 4920-01-478-6322: Overall Height: 58.0 MILLIMETERS NOMINAL MM; Overall Diameter: 34.0 MILLIMETERS MINIMUM AND 58.0 MILLIMETERS MAXIMUM MM; Special Features: THIS VALVE IS ESPECIALLY DESIGNED AND AND PATENTED FOR USE WITH THE NPP.SYSTEM, TWO VALVES ARE REQUIRED IN EACH COVER AND THEY ARE CONNECTED TO THE NPP SYSTEM, CONTROLLER VIA SPECIAL HOSES. ONE VALVE IS USED TO EXTRACT AIR FROM THE COVER AND THE OTHER TO INJECTNITROGEN GAS; End Item Identification: AE2100D3 TURBOPROP ENGINE. 1 specification is 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.
NSN 4920-01-478-6322 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.