The Valve,check, cataloged under National Stock Number 4820-01-533-7551, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bellvue Builders Supply Inc.. Government technical data includes 5 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-533-7551 |
| Primary Part Number | 510U23 3/4X3/4 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bellvue Builders Supply Inc. |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Operating Pressure | 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 49235K76 | Mcmaster-Carr Supply Co (USA) |
| 510U23 3/4X3/4 PRIMARY | Bellvue Builders Supply Inc. (USA) |
| Reference | Meaning |
|---|---|
| 49235K72 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
NSN 4820-01-533-7551 is a Valve,check, manufactured by Bellvue Builders Supply Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-533-7551 has 2 manufacturer part numbers on file: 49235K76 (Mcmaster-Carr Supply Co), 510U23 3/4X3/4 (Bellvue Builders Supply Inc.).
Key specifications for 510U23 3/4X3/4: Flow Control Device: POPPET; Mounting Position: HORIZONTAL OR VERTICAL; Operating Pressure: 175.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF. 5 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.