The Disk,valve, cataloged under National Stock Number 4820-01-443-3904, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Floworks Usa Lp Dba Flotech Div Jacksonville. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-443-3904 |
| Primary Part Number | 3-15055-B-03 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Floworks Usa Lp Dba Flotech Div Jacksonville |
| Status | ACTIVE |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Style Designator | SWING CHECK |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 15055B PC3 3IN | Floworks Usa Lp Dba Flotech Div Jacksonville (USA) |
| 3-15055-B-03 PRIMARY | Floworks Usa Lp Dba Flotech Div Jacksonville (USA) |
| 3-15055-B-03 | W. & O. Supply, Inc. Dba W & O Supply Inc Div Corporate Location (USA) |
| Reference | Meaning |
|---|---|
| 15055B | D/9 Drawing number reference only Floworks Usa Lp Dba Flotech Div Jacksonville |
NSN 4820-01-443-3904 is a Disk,valve, manufactured by Floworks Usa Lp Dba Flotech Div Jacksonville, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-443-3904 has 3 manufacturer part numbers on file: 15055B PC3 3IN (Floworks Usa Lp Dba Flotech Div Jacksonville), 3-15055-B-03 (Floworks Usa Lp Dba Flotech Div Jacksonville), 3-15055-B-03 (W. & O. Supply, Inc. Dba W & O Supply Inc Div Corporate Location).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-443-4518, 4820-01-443-4560. Verify interchangeability with system specifications before substitution.
Key specifications for 3-15055-B-03: Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Style Designator: SWING CHECK; Special Features: APPL.170 FT PATROL COASTAL(PC-1)CLASS SHIPS FT; End Item Identification: 4820-01-443-3847;CHECK VALVE. 3 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.
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.