The Disk,valve, cataloged under National Stock Number 4820-01-160-3655, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fluidyne Corporation Dba Fluidyne Corp. Government technical data includes 12 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-160-3655 |
| Primary Part Number | 253341 PIECE 5 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fluidyne Corporation Dba Fluidyne Corp |
| Status | ACTIVE |
| Shank Diameter | 2.375 INCHES NOMINAL IN |
| Flange Diameter | 4.125 INCHES NOMINAL IN |
| Pressure Rating | 50.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 775.0 FAHRENHEIT NOMINAL DEGF |
| Outside Diameter | 5.250 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Nominal Thread Size | 2.375 INCHES IN |
| Inside Diameter | 2.375 INCHES NOMINAL IN |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 253341 PIECE 5 | Derbyshire Machine & Tool Co (USA) |
| 253341 PIECE 5 PRIMARY | Fluidyne Corporation Dba Fluidyne Corp (USA) |
| Reference | Meaning |
|---|---|
| 253341 PIECE 5 | 5/9 Secondary reference P J Valves Inc |
| 253341 PIECE 5 | 5/9 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 253341 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-160-3655 is a Disk,valve, manufactured by Fluidyne Corporation Dba Fluidyne Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-160-3655 has 2 manufacturer part numbers on file: 253341 PIECE 5 (Derbyshire Machine & Tool Co), 253341 PIECE 5 (Fluidyne Corporation Dba Fluidyne Corp).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-170-5362, 4820-01-171-1545, 5975-01-298-0844. Verify interchangeability with system specifications before substitution.
Key specifications for 253341 PIECE 5: Shank Diameter: 2.375 INCHES NOMINAL IN; Flange Diameter: 4.125 INCHES NOMINAL IN; Overall Height: 6.500 INCHES NOMINAL IN; Pressure Rating: 50.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 12 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.