The Disk,valve, cataloged under National Stock Number 4820-01-227-2255, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-227-2255 |
| Primary Part Number | 01013 ITEM 21CP |
| 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 | 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 |
|---|---|
| 01013 ITEM 21CP | Naval Inventory Control Point Mechanicsburg (USA) |
| 680-64MCP | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 01012-1 ITEM 21 | 5/1 Secondary reference Tescom Corp Dba Tescom Div Tescom |
| 680-64M | 3/1 Design control — primary reference Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| 01013 ITEM 21 | 5/1 Secondary reference Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok |
| 680-64M | C/1 Advisory reference — outside the item-of-supply concept Tescom Corp Dba Tescom Div Tescom |
NSN 4820-01-227-2255 is a Disk,valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-227-2255 has 2 manufacturer part numbers on file: 01013 ITEM 21CP (Naval Inventory Control Point Mechanicsburg), 680-64MCP (Naval Inventory Control Point Mechanicsburg).
Key specifications for 01013 ITEM 21CP: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330. 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.
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.