The Indicator,differential, cataloged under National Stock Number 1650-00-923-1077, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-923-1077 |
| Primary Part Number | HP878128-2 |
| Item Name | Indicator,differential |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| General Characteristics Item Description | O/A LG. 1.169 IN.;FIRST END DIA. 0.749 IN.;SECOND END DIA. 0.600 IN.;SECOND END INTERNAL THREADED,UNF-3A;3000.0 PSI OPERATING PRESSURE;80.0 TO 275.0 DEGREES F OPERATING TEMP. A |
| 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 |
|---|---|
| HP878128-2 PRIMARY | Tactair Fluid Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| SP4280 | 5/2 Secondary reference U.S. Government activity |
| HP878128-2 | 5/9 Secondary reference U.S. Government activity |
| RC275UH09L | 5/9 Secondary reference Pall Aeropower Corporation |
| RC275UH09L | 5/9 Secondary reference Pall Gmbh |
NSN 1650-00-923-1077 is a Indicator,differential, manufactured by Tactair Fluid Controls Inc, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-923-1077 has 1 manufacturer part number on file: HP878128-2 (Tactair Fluid Controls Inc).
Key specifications for HP878128-2: General Characteristics Item Description: O/A LG. 1.169 IN.;FIRST END DIA. 0.749 IN.;SECOND END DIA. 0.600 IN.;SECOND END INTERNAL THREADED,UNF-3A;3000.0 PSI OPERATING PRESSURE;80.0 TO 275.0 DEGREES F OPERATING TEMP. A. 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 1650-00-923-1077 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.