The Disk,valve, cataloged under National Stock Number 4820-01-520-9577, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-520-9577 |
| Primary Part Number | 90H304CP |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Media for Which Designed | OXYGEN, GASEOUS OR NITROGEN, LIQUID |
| Material | NICKEL ALLOY |
| Reference Number Differentiating Characteristics | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 90H304CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 190000 PC NO. 3CP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 190000 PC NO. 3 | 5/1 Secondary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
| 190000 | D/9 Drawing number reference only Eaton Corporation Dba Eaton Inoac Div Eaton |
| 90H304 | 3/1 Design control — primary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
NSN 4820-01-520-9577 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-520-9577 has 2 manufacturer part numbers on file: 90H304CP (Naval Inventory Control Point Mechanicsburg), 190000 PC NO. 3CP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 90H304CP: Criticality Code Justification: ZZZY; Media for Which Designed: OXYGEN, GASEOUS OR NITROGEN, LIQUID; End Item Identification: 1/4 INCH CHECK VALVE IN; Material: NICKEL ALLOY. 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.