The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-237-6420, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Div Epd. Government technical data includes 3 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-237-6420 |
| Primary Part Number | 12HMC462X2 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Overall Diameter | 11.750 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Rotation Direction for Which Designed | CLOCKWISE |
| 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 |
|---|---|
| 12HMC462X2 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| W-249559 PIECE 3B | 5/9 Secondary reference U.S. Government activity |
| 12HMC462X2 | 3/9 Design control — primary reference U.S. Government activity |
| W-12HMC3BX1 | C/1 Advisory reference — outside the item-of-supply concept Ingersoll Rand Co |
| W-249559 | 5/9 Secondary reference U.S. Government activity |
| W-12HMC3BX1 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-01-237-6420 is a Impeller,pump,centrifugal, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-237-6420 has 1 manufacturer part number on file: 12HMC462X2 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 12HMC462X2: Overall Diameter: 11.750 INCHES NOMINAL IN; End Item Identification: INGERSOLL RAND MODEL 12HMC VERTICAL MAIN SEAWATER CIRCULATING PUMP; Material: NICKEL ALLOY; Rotation Direction for Which Designed: CLOCKWISE. 3 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.