The Gear Rotor Set,rotary Pump, cataloged under National Stock Number 4320-00-435-4403, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-435-4403 |
| Item Name | Gear Rotor Set,rotary Pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Component Quantity | 2 |
| Nonsupply Items and Quantities | OUTER GEAR 1;INNER GEAR 1 |
| 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 |
| Reference | Meaning |
|---|---|
| 252445 | 5/9 Secondary reference Kidde-Fenwal, Llc |
| 252445 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
| K252445 | 3/9 Design control — primary reference Meggitt (north Hollywood), Inc. Dba Meggitt Control Systems Div Meggitt Defense Systems, Inc. |
| K252445 | 5/9 Secondary reference Davey Compressor Co Div of Keco Industries Inc |
| K252445 | C/1 Advisory reference — outside the item-of-supply concept Meggitt Defense Systems, Inc. Dba Meggitt Defense Systems Inc |
NSN 4320-00-435-4403 is a Gear Rotor Set,rotary Pump, classified under FSC 4320, Power and Hand Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5331-01-320-9578. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-00-435-4403: Component Quantity: 2; Nonsupply Items and Quantities: OUTER GEAR 1;INNER GEAR 1; Special Features: MATL,STEEL;OUTER GEAR DATA;1.500 IN. OD;0.187 IN. THK;9 INTERNAL TEETH; INNER GEA DATA; 8 TEETH 1.040 IN. OD; 0.187 IN. THK; 0.625 IN. ID; KEYWAY IN ID 0.125 IN. W BY 0.062 IN. DP IN. 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.
NSN 4320-00-435-4403 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.