The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-020-8916, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Weil Pump Co Inc. Government technical data includes 17 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. 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 | 4320-00-020-8916 |
| Primary Part Number | A1200-9 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Weil Pump Co Inc |
| Status | ACTIVE |
| Keyway Type | RECTANGULAR |
| Keyway Depth | 0.125 INCHES NOMINAL IN |
| Hub Bore Diameter | 1.000 INCHES NOMINAL IN |
| Hub Length | 0.633 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 9.000 INCHES NOMINAL IN |
| Mounting Method | KEY |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 0.812 INCHES NOMINAL IN |
| Blade Quantity | 5 |
| Keyway Length | 1.688 INCHES NOMINAL IN |
| Hub Quantity | 1 |
| Hub Location | BACK SIDE |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| Blade Type | BACKWARD CURVE |
| 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 |
|---|---|
| A1200-9 PRIMARY | Weil Pump Co Inc (USA) |
| A2728-1PC14-36 | Weil Pump Co Inc (USA) |
NSN 4320-00-020-8916 is a Impeller,pump,centrifugal, manufactured by Weil Pump Co Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-020-8916 has 2 manufacturer part numbers on file: A1200-9 (Weil Pump Co Inc), A2728-1PC14-36 (Weil Pump Co Inc).
2 possible matches (shared part number, not a government interchangeability claim): 6740-00-814-3580, 3020-01-158-9400. Verify interchangeability with system specifications before substitution.
Key specifications for A1200-9: Keyway Type: RECTANGULAR; Keyway Depth: 0.125 INCHES NOMINAL IN; Hub Bore Diameter: 1.000 INCHES NOMINAL IN; Hub Length: 0.633 INCHES NOMINAL IN. 17 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.