The Valve,check, cataloged under National Stock Number 4820-01-592-2021, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is W & O Supply Inc. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-592-2021 |
| Primary Part Number | B15SWBC-150SW-01 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | W & O Supply Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Material Document and Classification | ASTN B52 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | ASTN B52 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Bonnet Type | OUTSIDE SCREW-YOKE |
| Material | COPPER ALLOY 836 BODY |
| Material | COPPER ALLOY 836 SEAT |
| 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 |
|---|---|
| B15SWBC-150SW-01 PRIMARY | W & O Supply Inc (USA) |
| 052503.450 | W & O Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| 52503.45 | 5/9 Secondary reference W & O Supply Inc |
NSN 4820-01-592-2021 is a Valve,check, manufactured by W & O Supply Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-592-2021 has 2 manufacturer part numbers on file: B15SWBC-150SW-01 (W & O Supply Inc), 052503.450 (W & O Supply Inc).
Key specifications for B15SWBC-150SW-01: Flow Control Device: DISK; Material Document and Classification: ASTN B52 ASSN STD SINGLE MATERIAL RESPONSE BODY; Material Document and Classification: ASTN B52 ASSN STD SINGLE MATERIAL RESPONSE SEAT; Bonnet Type: OUTSIDE SCREW-YOKE. 6 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.