The Head,fluid Filter, cataloged under National Stock Number 1650-00-658-0071, 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 Falls Filtration Technologies, Inc.. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-658-0071 |
| Primary Part Number | 01T25465A |
| Item Name | Head,fluid Filter |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Falls Filtration Technologies, Inc. |
| Status | ACTIVE |
| FSC Application Data | DRIVE,CONSTANT SPEED,HYDRAULIC 1650006728006 P/N 635670K |
| Filtration Rating in Microns | 60.0 NOMINAL |
| Inlet Port Type | FLANGE |
| Usage Design | DIRECT INTEGRAL CAVITY MOUNTING |
| Filtering Material Design | SINGLE STACKED DISKS |
| Center to Center Distance Between Mounting Holes | EQUALLY SPACED ON 2.500 IN. DIA BOLT CIRCLE IN |
| Inlet Flange Mounting Hole Diameter | 0.207 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Inlet Flange Mounting Provision and Quantity | 6 HOLES |
| Valve | INCLUDED |
| Valve Type | RELIEF |
| Filter Element | INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 01T25465A PRIMARY | Falls Filtration Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 61600A | 5/9 Secondary reference Hamilton Sundstrand Corp |
| 61600A | 5/2 Secondary reference U.S. Government activity |
NSN 1650-00-658-0071 is a Head,fluid Filter, manufactured by Falls Filtration Technologies, Inc., classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-658-0071 has 1 manufacturer part number on file: 01T25465A (Falls Filtration Technologies, Inc.).
Key specifications for 01T25465A: Overall Height: 5.555 INCHES MAXIMUM IN; FSC Application Data: DRIVE,CONSTANT SPEED,HYDRAULIC 1650006728006 P/N 635670K; Filtration Rating in Microns: 60.0 NOMINAL; Inlet Port Type: FLANGE. 11 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.
NSN 1650-00-658-0071 has DEMIL Code B. 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.