The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-01-437-9333, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is John Crane, Inc. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | John Crane, Inc (CAGE 71724); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-437-9333 |
| Primary Part Number | B43646 |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | John Crane, 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 |
|---|---|
| B43646 PRIMARY | John Crane, Inc (USA) |
| 6960581 PIECE 10 | Naval Sea Systems Command (USA) |
| 593-6960581 PC10 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| B436-46 | 3/9 Design control — primary reference U.S. Government activity |
| 9960 | 5/9 Secondary reference E G and G Sealol Inc Industrial Div |
NSN 4320-01-437-9333 is a Seal Assembly,shaft,spring Loade, manufactured by John Crane, Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-437-9333 has 3 manufacturer part numbers on file: B43646 (John Crane, Inc), 6960581 PIECE 10 (Naval Sea Systems Command), 593-6960581 PC10 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-708-2674. 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.