The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-497-4299, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-497-4299 |
| Primary Part Number | 566-7067171-7 |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | PLAIN (SCREW-IN CARTRIDGE) ALL ENDS |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Style Designator | SCREW-IN CARTRIDGE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Thread Class | 2A ALL ENDS A |
| Material | STEEL BODY |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 566-7067171-7 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H625-0309 | D/9 Drawing number reference only U.S. Government activity |
| H625-0309-7 | 5/2 Secondary reference U.S. Government activity |
| 566-7067171 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-497-4299 is a Valve,bleeder,hydraulic System, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-497-4299 has 1 manufacturer part number on file: 566-7067171-7 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-497-5152, 3040-01-497-5194, 3040-01-497-5247. Verify interchangeability with system specifications before substitution.
Key specifications for 566-7067171-7: Connection Style: PLAIN (SCREW-IN CARTRIDGE) ALL ENDS; Connection Type: THREADED CARTRIDGE ALL ENDS; Style Designator: SCREW-IN CARTRIDGE; Thread Direction: RIGHT-HAND ALL ENDS. 9 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.