The Sleeve,shaft,pump, cataloged under National Stock Number 4320-01-331-3551, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-331-3551 |
| Item Name | Sleeve,shaft,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES OVERALL |
| Corner Shape | SQUARE INSIDE RIGHT CORNER |
| Corner Shape | SQUARE LEFT FLANGE BODY CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | CHAMFERED OUTSIDE RIGHT CORNER |
| Flange Outside Diameter | 2.0000 INCHES NOMINAL IN |
| Body Outside Diameter | 1.7500 INCHES NOMINAL IN |
| Style Designator | SOLID, EXTERNAL FLANGE ONE END |
| Material Document and Classification | QQ-N-281,CLASS A,CLASS B FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Body Inside Diameter | 1.5000 INCHES NOMINAL IN |
| Antirotation/lubrication Type and Quantity | 2 HOLE |
| Flange Width | 1.6250 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL |
| Hole Diameter | 0.1640 INCHES NOMINAL FIRST IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SK-6362-3 | D/9 Drawing number reference only U.S. Government activity |
| SK-6362-3 REV A | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SK-6362-3 PIECE 1 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4320-01-331-3551 is a Sleeve,shaft,pump, classified under FSC 4320, Power and Hand Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4320-01-345-2543. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-01-331-3551: Surface Finish: 63.0 MICROINCHES OVERALL; Corner Shape: SQUARE INSIDE RIGHT CORNER; Corner Shape: SQUARE LEFT FLANGE BODY CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER. 16 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.