The Filter,fluid, cataloged under National Stock Number 1650-00-372-5539, 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 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1650-00-372-5539 |
| Primary Part Number | 11-11221 |
| Item Name | Filter,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Pti Technologies Inc. |
| Status | ACTIVE |
| Filtration Rating in Microns | 5.0 ABSOLUTE |
| Design Type | REUSABLE |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | DRAIN PLUG AND BY-PASS VALVE |
| Filtering Element Quantity | 1 |
| Material | ALUMINUM ALLOY SEDIMENT BOWL |
| 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 |
|---|---|
| 11-11221 PRIMARY | Pti Technologies Inc. (USA) |
| Reference | Meaning |
|---|---|
| 694958-101 | 7/2 Vendor item drawing reference U.S. Government activity |
| 11-11221 | 5/9 Secondary reference U.S. Government activity |
| 11-11221 | 5/9 Secondary reference U.S. Government activity |
NSN 1650-00-372-5539 is a Filter,fluid, manufactured by Pti Technologies Inc., classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-372-5539 has 1 manufacturer part number on file: 11-11221 (Pti Technologies Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-274-2095. Verify interchangeability with system specifications before substitution.
Key specifications for 11-11221: Filtration Rating in Microns: 5.0 ABSOLUTE; Design Type: REUSABLE; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS; Features Provided: DRAIN PLUG AND BY-PASS VALVE. 6 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.