The Valve,check, cataloged under National Stock Number 4820-01-017-2601, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-017-2601 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Seat Angle | 37.0 DEGREES FIRST END |
| Thread Class | 3A FIRST END A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 4048T65P01 | 5/2 Secondary reference U.S. Government activity |
| 4048T65P01 | 5/9 Secondary reference Echelon Supply and Service, Inc. |
| 8-1575-1 | 5/9 Secondary reference U.S. Government activity |
| 4048T65 | D/9 Drawing number reference only U.S. Government activity |
| 8-1575-1 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| 4048T65P01 | 5/9 Secondary reference Mega Fluidline Products, Inc. |
| 4048T65P01 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-017-2601 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-017-2601: Connection Style: FLARED (TUBE) FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Style Designator: STRAIGHT THRU; Nominal Outside Diameter Tube Accommodated: 0.500 INCHES FIRST END IN. 7 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.