The Seal Assembly,shaft Log,ship, cataloged under National Stock Number 2040-01-345-1487, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment 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 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 2040-01-345-1487 |
| Primary Part Number | 30.750 TYPE MX9 |
| Item Name | Seal Assembly,shaft Log,ship |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | John Crane, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | SEAWATER SERVICE;AMBIENT TEMP 28 TO 95 DEG F;PRESSURE 9 PSIG;REV/MIN 143.5 DEGF |
| 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 |
|---|---|
| US71686 | Defense Maritime Solutions, Inc. (USA) |
| 30.750 TYPE MX9 PRIMARY | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| US71686 | 5/9 Secondary reference Wartsila Lips Inc |
| US71686 | 5/9 Secondary reference John Crane, Inc |
NSN 2040-01-345-1487 is a Seal Assembly,shaft Log,ship, manufactured by John Crane, Inc, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-345-1487 has 2 manufacturer part numbers on file: US71686 (Defense Maritime Solutions, Inc.), 30.750 TYPE MX9 (John Crane, Inc).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-348-8055. Verify interchangeability with system specifications before substitution.
Key specifications for 30.750 TYPE MX9: General Characteristics Item Description: SEAWATER SERVICE;AMBIENT TEMP 28 TO 95 DEG F;PRESSURE 9 PSIG;REV/MIN 143.5 DEGF; End Item Identification: STERN TUBE SEAL ASSY. 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.