The Valve,check, cataloged under National Stock Number 4820-00-941-9902, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is United Technologies Automotive Inc Components Div. Government technical data includes 21 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-941-9902 |
| Primary Part Number | E263X6 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | United Technologies Automotive Inc Components Div |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Nominal Pipe Size Accommodated | 0.250 INCHES SECOND END IN |
| Connection Style | COMPRESSION (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Thread Class | 3A FIRST END A |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | UNEF FIRST END |
| Thread Series Designator | NPT SECOND END |
| 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 |
| Part Number | Manufacturer |
|---|---|
| E263X6 PRIMARY | United Technologies Automotive Inc Components Div (USA) |
NSN 4820-00-941-9902 is a Valve,check, manufactured by United Technologies Automotive Inc Components Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-941-9902 has 1 manufacturer part number on file: E263X6 (United Technologies Automotive Inc Components Div).
Key specifications for E263X6: Flow Control Device: BALL; Nominal Pipe Size Accommodated: 0.250 INCHES SECOND END IN; Connection Style: COMPRESSION (TUBE) FIRST END; Connection Style: PLAIN (PIPE) 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.