The Disk,valve, cataloged under National Stock Number 4820-01-351-6040, 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 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-351-6040 |
| Primary Part Number | ACV-2913 ITEM 3 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Core Industries Inc. Dba Mueller Steam Specialty |
| Status | ACTIVE |
| Pressure Rating | 200.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Material Document and Classification | ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE |
| Media for Which Designed | GAS OR OIL |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 |
| 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-2.5-91-3-U | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| ACV-2913 ITEM 3 PRIMARY | Core Industries Inc. Dba Mueller Steam Specialty (USA) |
| Reference | Meaning |
|---|---|
| ACV-2913 | D/9 Drawing number reference only Core Industries Inc. Dba Mueller Steam Specialty |
NSN 4820-01-351-6040 is a Disk,valve, manufactured by Core Industries Inc. Dba Mueller Steam Specialty, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-351-6040 has 2 manufacturer part numbers on file: D-2.5-91-3-U (Core Industries Inc. Dba Mueller Steam Specialty), ACV-2913 ITEM 3 (Core Industries Inc. Dba Mueller Steam Specialty).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-351-9888. Verify interchangeability with system specifications before substitution.
Key specifications for ACV-2913 ITEM 3: Pressure Rating: 200.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Material Document and Classification: ASTM B164 ASSN STD SINGLE MATERIAL RESPONSE; Media for Which Designed: GAS OR OIL; End Item Identification: MUELLER STEAM SPECIALTY CHECK VALVE MODEL NO. 101M-CUS,SIZE 2.500 IN. IN. 4 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.