The Disk,valve, cataloged under National Stock Number 4820-01-451-4242, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Core Industries Inc. Dba Mueller Steam Specialty. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-4242 |
| Primary Part Number | D-2.0-72-03-Q-0 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Core Industries Inc. Dba Mueller Steam Specialty |
| Status | ACTIVE |
| Pressure Rating | 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 150.0 FAHRENHEIT NOMINAL DEGF |
| Style Designator | SWING CHECK |
| Media for Which Designed | WATER, SALT |
| Material | NICKEL ALLOY |
| 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 |
|---|---|
| D-2.0-72-03-Q-0 PRIMARY | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| AN-2.0-72B-B ITEM 2 | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| Reference | Meaning |
|---|---|
| AN-2.0-72B-B | D/9 Drawing number reference only Core Industries Inc. Dba Mueller Steam Specialty |
NSN 4820-01-451-4242 is a Disk,valve, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-4242 has 2 manufacturer part numbers on file: D-2.0-72-03-Q-0 (Core Industries Inc. Dba Mueller Steam Specialty), AN-2.0-72B-B ITEM 2 (Core Industries Inc. Dba Mueller Steam Specialty).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-451-4267. Verify interchangeability with system specifications before substitution.
Key specifications for D-2.0-72-03-Q-0: Pressure Rating: 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Temp Rating: 150.0 FAHRENHEIT NOMINAL DEGF; Style Designator: SWING CHECK; Special Features: COMPONENT OF 2 IN.CHECK VALVE,NSN 4820-01-451-4230 IN. 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.