The Impeller Washer, cataloged under National Stock Number 4320-00-256-5503, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Itt Goulds Pumps, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Impeller Washer |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Itt Goulds Pumps, Inc. (CAGE 25681) |
| Parameter | Value |
|---|---|
| NSN | 4320-00-256-5503 |
| Primary Part Number | 13K299 |
| Item Name | Impeller Washer |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Itt Goulds Pumps, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 13K299 PRIMARY | Itt Goulds Pumps, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 15957-00 | 5/9 Secondary reference Eastern Industrial Products, Inc. |
NSN 4320-00-256-5503 is a Impeller Washer, manufactured by Itt Goulds Pumps, Inc., classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-256-5503 has 1 manufacturer part number on file: 13K299 (Itt Goulds Pumps, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 6625-01-370-9880. Verify interchangeability with system specifications before substitution.
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.