The Sleeve,shaft,pump, cataloged under National Stock Number 4320-00-218-3281, 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 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-218-3281 |
| Primary Part Number | 12890P |
| Item Name | Sleeve,shaft,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| Status | ACTIVE |
| Left Internal Flange Width | 1.5000 INCHES NOMINAL IN |
| Left Internal Flange Hole Diameter | 0.7500 INCHES NOMINAL IN |
| Corner Shape | CHAMFERED INSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Body Outside Diameter | 1.3750 INCHES NOMINAL IN |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES, INTERNAL FLANGE ONE END |
| Body Inside Diameter | 1.1250 INCHES NOMINAL IN |
| Material | NICKEL ALLOY OVERALL |
| Keyway Dimension | 0.7500 INCHES NOMINAL INTERNAL KEYWAY LENGTH IN |
| Keyway Dimension | 0.0940 INCHES NOMINAL INTERNAL KEYWAY DEPTH IN |
| 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 |
|---|---|
| 256418-2 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| 12890P PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| SL6418PC14 | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| 256418-2 | 5/9 Secondary reference U.S. Government activity |
| 12890P | 3/9 Design control — primary reference U.S. Government activity |
| SL6418PC14 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-00-218-3281 is a Sleeve,shaft,pump, manufactured by Curtiss-Wright Electro-Mechanical Corporation Div Epd, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-218-3281 has 3 manufacturer part numbers on file: 256418-2 (Curtiss-Wright Electro-Mechanical Corporation Div Epd), 12890P (Curtiss-Wright Electro-Mechanical Corporation Div Epd), SL6418PC14 (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
Key specifications for 12890P: Left Internal Flange Width: 1.5000 INCHES NOMINAL IN; Left Internal Flange Hole Diameter: 0.7500 INCHES NOMINAL IN; Corner Shape: CHAMFERED INSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE RIGHT CORNER. 12 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.