The Valve,check, cataloged under National Stock Number 4820-00-627-4777, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Federal Industries, Inc. Dba United Valve Company. Government technical data includes 19 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-627-4777 |
| Primary Part Number | 1111-578574 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Federal Industries, Inc. Dba United Valve Company |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | FLARED (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES FIRST END IN |
| Operating Pressure | 60.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 1.312 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Class | 3A FIRST END A |
| Thread Quantity Per Inch | 12 FIRST END |
| Material | ALUMINUM ALLOY 2017 BODY |
| Material | RUBBER SEAT |
| Thread Series Designator | UNF FIRST 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 |
|---|---|
| 1111-578574 | Federal Industries, Inc. Dba United Valve Company (USA) |
| Reference | Meaning |
|---|---|
| 2-20544 | 5/9 Secondary reference U.S. Government activity |
| 1111-578574 | 3/2 Design control — primary reference U.S. Government activity |
| MS28884A-16 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 16C240-1 | 3/2 Design control — primary reference U.S. Government activity |
| 1111-578574 | 5/9 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| 695833-1 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-00-627-4777 is a Valve,check, manufactured by Federal Industries, Inc. Dba United Valve Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-627-4777 has 1 manufacturer part number on file: 1111-578574 (Federal Industries, Inc. Dba United Valve Company).
4 possible matches (shared part number, not a government interchangeability claim): 2540-01-184-4072, 5999-01-229-6946, 5130-01-406-1372. Verify interchangeability with system specifications before substitution.
Key specifications for 1111-578574: Flow Control Device: DISK; Connection Style: FLARED (TUBE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: THREADED EXTERNAL TUBE FIRST END. 19 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.