The Valve,bleeder,hydraulic System, cataloged under National Stock Number 4820-01-660-2229, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-660-2229 |
| Primary Part Number | 6610M6Y |
| Item Name | Valve,bleeder,hydraulic System |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 6000.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Maximum Operating Temp | 600.00 FAHRENHEIT SECOND RESPONSE DEGF |
| Maximum Operating Temp | 70.00 FAHRENHEIT FIRST RESPONSE DEGF |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 6610M6Y PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| Reference | Meaning |
|---|---|
| 593-7556857 PC. NO. 27 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4820-01-660-2229 is a Valve,bleeder,hydraulic System, manufactured by Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-660-2229 has 1 manufacturer part number on file: 6610M6Y (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok).
Key specifications for 6610M6Y: Flow Control Device: BALL; Style Designator: STRAIGHT THRU; Operating Pressure: 6000.00 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS; Nominal Thread Size: 0.375 INCHES FIRST END IN. 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.