The Valve,check, cataloged under National Stock Number 4820-01-193-6290, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-193-6290 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Supplementary Features | FLOW CONTROL DEVICE: NEEDLE |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-A-200/3 ALLOY 2024 T4 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-A-225/6 ALLOY 2024 T351 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-763 CL 304 FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-764,TY 303 FED SPEC 2ND MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY 2024 BODY |
| Material | STEEL COMP 304 AND STEEL COMP 303 FLOW CONTROL DEVICE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 806927-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-193-6290 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-193-6290: Connection Style: FLARED (TUBE) ALL ENDS; Mounting Position: HORIZONTAL; Supplementary Features: FLOW CONTROL DEVICE: NEEDLE; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 16 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.