The Filter,fluid, cataloged under National Stock Number 1650-01-304-4171, 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 Pti Technologies Inc.. Government technical data includes 2 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-01-304-4171 |
| Primary Part Number | 7587798 |
| Item Name | Filter,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Pti Technologies Inc. |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY SOURCE CONTROL DRAWING |
| 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 |
|---|---|
| 7587798 | Pti Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 4H90402-101C | 1/3 Source control — Government-approved source U.S. Government activity |
NSN 1650-01-304-4171 is a Filter,fluid, manufactured by Pti Technologies Inc., classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-01-304-4171 has 1 manufacturer part number on file: 7587798 (Pti Technologies Inc.).
Key specifications for 7587798: FSC Application Data: AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS; Special Features: USED ON C-5B AIRCRAFT; Reference Number Differentiating Characteristics: AS DIFFERENTIATED BY SOURCE CONTROL DRAWING. 2 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.