The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-00-477-2584, 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. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-477-2584 |
| Primary Part Number | B05175 |
| Item Name | Seal Assembly,shaft,spring Loade |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | CONSIST OF STATOR RING,GASKET,MATING RING,BELLOWS,RETAINER,SPRING,DISC,DRIVE BAND,SPRING HOLDER,3.625 IN. BORE DIA,1.250 IN. SHAFT DIA,1.500 IN. INSTALLED LG,2.062 IN. SEAL OD 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 |
|---|---|
| B05175 PRIMARY | John Crane, Inc (USA) |
| PP046JDL | Circor Pumps North America Llc (USA) |
| HSP-4721-1 BF50171 | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| H-SP-4721-1 X-F911O151 (316) | 5/9 Secondary reference Wartsila Lips Inc |
| H-SP-4721-1 | 5/9 Secondary reference John Crane, Inc |
| FSP14807 | 5/9 Secondary reference John Crane, Inc |
| H-SP-4721-1 X-F911O151 (316) | 5/9 Secondary reference John Crane, Inc |
| HSP4721-1 BF50171 | 5/9 Secondary reference Wartsila Lips Inc |
| PP046JDL | 5/9 Secondary reference Siemens Energy, Inc. |
| B057175 | 5/9 Secondary reference John Crane, Inc |
NSN 4320-00-477-2584 is a Seal Assembly,shaft,spring Loade, manufactured by John Crane, Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-477-2584 has 3 manufacturer part numbers on file: B05175 (John Crane, Inc), PP046JDL (Circor Pumps North America Llc), HSP-4721-1 BF50171 (John Crane, Inc).
1 possible match (shared part number, not a government interchangeability claim): 4720-00-835-8958. Verify interchangeability with system specifications before substitution.
Key specifications for B05175: General Characteristics Item Description: CONSIST OF STATOR RING,GASKET,MATING RING,BELLOWS,RETAINER,SPRING,DISC,DRIVE BAND,SPRING HOLDER,3.625 IN. BORE DIA,1.250 IN. SHAFT DIA,1.500 IN. INSTALLED LG,2.062 IN. SEAL OD IN. 1 specification is 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.