The Seal Assembly,shaft,spring Loade, cataloged under National Stock Number 4320-00-256-7102, 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 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-256-7102 |
| Primary Part Number | M49158 |
| 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 SEAT+ SEAT RING+ WASHER+ BELLOWS+ SPRING+ RETAINER |
| 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 |
|---|---|
| M49158 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| CFSP17337 | 5/9 Secondary reference John Crane, Inc |
| NSP-00255 XF91171(316) | 5/9 Secondary reference Wartsila Lips Inc |
| NSP-00255 | C/1 Advisory reference — outside the item-of-supply concept Defense Maritime Solutions, Inc. |
| CFSP77241-2 | 5/9 Secondary reference John Crane, Inc |
| NSP-00255 M491-58 | 5/9 Secondary reference Wartsila Lips Inc |
| F-5352 PIECE 025 | 5/9 Secondary reference Circor Pumps North America Llc |
| PP046JG | 5/9 Secondary reference Circor Pumps North America Llc |
| NSP-00255 | 3/9 Design control — primary reference Wartsila Lips Inc |
NSN 4320-00-256-7102 is a Seal Assembly,shaft,spring Loade, manufactured by John Crane, Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-256-7102 has 1 manufacturer part number on file: M49158 (John Crane, Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-189-8415. Verify interchangeability with system specifications before substitution.
Key specifications for M49158: General Characteristics Item Description: CONSIST OF SEAT+ SEAT RING+ WASHER+ BELLOWS+ SPRING+ RETAINER. 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.