The Parts Kit,pump, cataloged under National Stock Number 5330-00-057-6579, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Defense Maritime Solutions, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-00-057-6579 |
| Primary Part Number | B21764 |
| Item Name | Parts Kit,pump |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Defense Maritime Solutions, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF 1 HELICAL COMPRESSION SPRING,1 SPRING RETAINER,1 SEAL AND RETAINER ASSEMBLY,1 GASKET,1 RETAINER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B21764 PRIMARY | Defense Maritime Solutions, Inc. (USA) |
| CF-SP-21978/XP10151(316) | Defense Maritime Solutions, Inc. (USA) |
| B21764 | John Crane, Inc (USA) |
| Reference | Meaning |
|---|---|
| CF-SP-219781XP10151(316) | 5/9 Secondary reference John Crane, Inc |
| CF-SP-78191-3 | 5/9 Secondary reference John Crane, Inc |
| CFSP21978TY21SZ 1.0-XP171 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| CF-SP-21978/XP10151(316) | 3/9 Design control — primary reference Wartsila Lips Inc |
| CFSP21978 | 5/9 Secondary reference John Crane, Inc |
| CF-SP-21978/XP10151(316) | C/1 Advisory reference — outside the item-of-supply concept John Crane, Inc |
NSN 5330-00-057-6579 is a Parts Kit,pump, manufactured by Defense Maritime Solutions, Inc., classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-00-057-6579 has 3 manufacturer part numbers on file: B21764 (Defense Maritime Solutions, Inc.), CF-SP-21978/XP10151(316) (Defense Maritime Solutions, Inc.), B21764 (John Crane, Inc).
Key specifications for B21764: General Characteristics Item Description: CONSISTS OF 1 HELICAL COMPRESSION SPRING,1 SPRING RETAINER,1 SEAL AND RETAINER ASSEMBLY,1 GASKET,1 RETAINER. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.