The Disk,valve, cataloged under National Stock Number 4820-01-545-0003, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-545-0003 |
| Primary Part Number | 4788589 ITEM 5L1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 4788589 ITEM 5L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 209-6295389 ITEM 5L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 209-4788587L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 4788589-0005L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 209-4788589 ITEM 5L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 209-6295389L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 5295389L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 209-6937441 ITEM 11L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 209-6295389 | 5/1 Secondary reference U.S. Government activity |
| 4788589-0005 | 5/1 Secondary reference U.S. Government activity |
| 5295389 | 5/1 Secondary reference U.S. Government activity |
| 209-6937441 ITEM 11 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 209-6295389 ITEM 5 | 5/1 Secondary reference Naval Sea Systems Command |
| 4788589 ITEM 5 | 3/1 Design control — primary reference U.S. Government activity |
| 209-4788587 | 5/1 Secondary reference U.S. Government activity |
| 209-4788589 ITEM 5 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-545-0003 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-545-0003 has 8 manufacturer part numbers on file: 4788589 ITEM 5L1 (Naval Inventory Control Point Mechanicsburg), 209-6295389 ITEM 5L1 (Naval Inventory Control Point Mechanicsburg), 209-4788587L1 (Naval Inventory Control Point Mechanicsburg), 4788589-0005L1 (Naval Inventory Control Point Mechanicsburg), 209-4788589 ITEM 5L1 (Naval Inventory Control Point Mechanicsburg) and 3 more.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-644-7036, 4820-01-648-3742. Verify interchangeability with system specifications before substitution.
Key specifications for 4788589 ITEM 5L1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: MSW 16/14 HULL & BACKUP VALVE ASSY & DTLS (DRAWING); End Item Identification: VALVE B COMBINATION 16&14 INCH ASSEMBLY MSW6 X 8 STL; VALVE B COMBINATION 16&14 INCH ASSEMBLY MSW 1 X 3 STL; VALVE B COMBINATION 16&14 INCH MSW SSTL; VALVE B COMBINATION 16X14IPS 650PSI BTWLD STL; VALVE MSW 16.14 HULL SUCTION; VALVE MSW 16/14 HULL DISCH IN; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS. 2 specifications are 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.
NSN 4820-01-545-0003 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.