The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-977-1111, 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 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-00-977-1111 |
| Primary Part Number | X3DM3BX2-338HM |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Keyway Type | RECTANGULAR |
| Keyway Depth | 0.125 INCHES NOMINAL IN |
| Hub Bore Diameter | 2.500 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN |
| Hub Length | 1.625 INCHES NOMINAL IN |
| Design Type | DOUBLE WIDTH |
| Overall Diameter | 8.750 INCHES NOMINAL IN |
| Mounting Method | KEY |
| Material Document and Classification | MIL-S-16993A, CLASS 1 MIL SPEC SINGLE MATERIAL RESPONSE A |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 1.687 INCHES NOMINAL IN |
| Blade Quantity | 5 |
| Keyway Length | 1.938 INCHES NOMINAL IN |
| Hub Quantity | 1 |
| Hub Location | CENTERLINE |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Material | STEEL UNS J91150 |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| 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 |
|---|---|
| X3DM3BX2-338HM PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| X3DM3BX2-338HM | 5/9 Secondary reference Ingersoll Rand Co |
| X3DM3BX2-338HM | 3/9 Design control — primary reference U.S. Government activity |
NSN 4320-00-977-1111 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 4320-00-977-1111 has 1 manufacturer part number on file: X3DM3BX2-338HM (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for X3DM3BX2-338HM: Keyway Type: RECTANGULAR; Keyway Depth: 0.125 INCHES NOMINAL IN; Hub Bore Diameter: 2.500 INCHES MINIMUM AND 2.500 INCHES MAXIMUM IN; Hub Length: 1.625 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.