The Disk,valve, cataloged under National Stock Number 4820-01-227-3090, 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 2 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-227-3090 |
| Primary Part Number | 501-4457020 ITEM 9L1 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 501-4457020 ITEM 9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-4457023 ITEM 9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-86 ITEM 9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-5923256X5923259 IT.9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-82 ITEM 9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 6503-158 ITEM 9L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 601-5923256X5923259 IT.9 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6503-158 ITEM 9 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6503-82 ITEM 9 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 6503-86 ITEM 9 | 3/1 Design control — primary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 88-D-708 | 5/1 Secondary reference Derbyshire Machine & Tool Co |
| 501-4457020 ITEM 9 | 5/1 Secondary reference U.S. Government activity |
| 501-4457023 ITEM 9 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-227-3090 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-227-3090 has 6 manufacturer part numbers on file: 501-4457020 ITEM 9L1 (Naval Inventory Control Point Mechanicsburg), 501-4457023 ITEM 9L1 (Naval Inventory Control Point Mechanicsburg), 6503-86 ITEM 9L1 (Naval Inventory Control Point Mechanicsburg), 501-5923256X5923259 IT.9L1 (Naval Inventory Control Point Mechanicsburg), 6503-82 ITEM 9L1 (Naval Inventory Control Point Mechanicsburg) and 1 more.
Key specifications for 501-4457020 ITEM 9L1: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 2 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.
NSN 4820-01-227-3090 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.