The Valve,check, cataloged under National Stock Number 4820-01-487-5070, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-487-5070 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Flange Shape | OVAL WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Nominal Length | 2.500 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 0.357 INCHES FIRST END IN |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.281 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Nominal Thread Size | 0.562 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Bolt Hole Quantity | 2 FIRST END |
| Nominal Width | 1.375 INCHES FIRST END IN |
| Thread Class | 3A SECOND END A |
| Material | STEEL CORROSION RESISTING BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.188 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 175084 | D/9 Drawing number reference only U.S. Government activity |
| 175084-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-487-5070 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5310-01-487-6277, 6105-01-491-2791. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-487-5070: Flow Control Device: BALL; Flange Shape: OVAL WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END. 21 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.