The Valve,ball, cataloged under National Stock Number 4820-01-729-4557, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-729-4557 |
| Primary Part Number | 2644-2003 ASSY IRAL1 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| 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 |
|---|---|
| 2644-2003 ASSY IRAL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 845-8617286 ASSY IRAL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 8617286/SHT6/ASSY DWG | D/9 Drawing number reference only Naval Sea Systems Command |
| 845-8617286 ASSY IRA | 3/1 Design control — primary reference Naval Sea Systems Command |
| 2644-2003 ASSY IRA | 5/2 Secondary reference U.S. Government activity |
| 8617286/SHT6/ASSY DWG | C/1 Advisory reference — outside the item-of-supply concept Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-729-4557 is a Valve,ball, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-729-4557 has 2 manufacturer part numbers on file: 2644-2003 ASSY IRAL1 (Naval Inventory Control Point Mechanicsburg), 845-8617286 ASSY IRAL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 2644-2003 ASSY IRAL1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: VALVE BALL ASSEMBLY; End Item Identification: VALVE BALL 2-1/2IN FLOOD AND DRAIN IN; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I 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.
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.