The Valve,check, cataloged under National Stock Number 4820-00-461-3754, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 24 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 | 4820-00-461-3754 |
| Primary Part Number | SS50-919L14C |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Connection Style | FLARED (TUBE) SECOND ENDFLARED (TUBE) SECOND END |
| Connection Style | FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR HORIZONTAL OR VERTICALVERTICAL |
| Connection Type | THREADED EXTERNAL TUBE SECOND ENDTHREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST ENDTHREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Material Document and Classification | QQ-S-763,CLASS 304 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES SECOND END0.625 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND SECOND ENDRIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST ENDRIGHT-HAND FIRST END |
| Nominal Thread Size | 0.562 INCHES SECOND END0.562 INCHES SECOND END IN |
| Nominal Thread Size | 0.875 INCHES FIRST END0.875 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Seat Angle | 37.0 DEGREES SECOND END37.0 DEGREES FIRST END |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Class | 3A SECOND END3A SECOND END A |
| Thread Class | 3A FIRST END3A FIRST END A |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNF SECOND END |
| Thread Series Designator | UNF SECOND ENDUNF FIRST END |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| 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 |
|---|---|
| SS50-919L14C PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 4820-00-461-3754 is a Valve,check, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-461-3754 has 1 manufacturer part number on file: SS50-919L14C (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for SS50-919L14C: Flow Control Device: DISKDISK; Connection Style: FLARED (TUBE) SECOND ENDFLARED (TUBE) SECOND END; Connection Style: FLARED (TUBE) FIRST ENDFLARED (TUBE) FIRST END; Mounting Position: HORIZONTAL OR HORIZONTAL OR VERTICALVERTICAL. 24 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.