The Filtering Disk,fluid, cataloged under National Stock Number 1650-00-972-4073, 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 Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-972-4073 |
| Primary Part Number | 21694 |
| Item Name | Filtering Disk,fluid |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div |
| Status | ACTIVE |
| Body Diameter | 0.101 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| FSC Application Data | FILTER,HYDRAULIC SYSTEM,AIRCRAFT |
| Filtration Rating in Microns | 40.0 NOMINAL AND 70.0 ABSOLUTE |
| Style Designator | ROUND (BASICALLY FLAT) |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Test Data Document | 77068-3170057 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY TEST REQUIREMENT |
| Body Thickness | 0.010 INCHES MINIMUM AND 0.012 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 3170057 | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| 21694 | Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div (USA) |
| Reference | Meaning |
|---|---|
| 3170057 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
NSN 1650-00-972-4073 is a Filtering Disk,fluid, manufactured by Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-972-4073 has 2 manufacturer part numbers on file: 3170057 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)), 21694 (Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div).
2 possible matches (shared part number, not a government interchangeability claim): 5950-01-262-2928, 4730-01-645-0255. Verify interchangeability with system specifications before substitution.
Key specifications for 21694: Body Diameter: 0.101 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN; FSC Application Data: FILTER,HYDRAULIC SYSTEM,AIRCRAFT; Filtration Rating in Microns: 40.0 NOMINAL AND 70.0 ABSOLUTE; Style Designator: ROUND (BASICALLY FLAT). 8 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 1650-00-972-4073 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.