The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-366-2031, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-366-2031 |
| Primary Part Number | 255551 PIECE 3 AND 4Q3 |
| Item Name | Parts Kit,ball Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| End Item Source | 80064 |
| Criticality Code Justification | ZZZY |
| End Item Name | BALL VALVE |
| Reference Number Differentiating Characteristics | ITEM THAT SUPPORTS A LEVEL 1 OR SUBSAFE CRITICAL SYSTEM THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION |
| 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 |
|---|---|
| 255551 PIECE 3 AND 4Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2050965 PIECE 2,5ULTM1000Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 255551 PIECE 3 AND 4 | 5/1 Secondary reference Huntington Ingalls Inc Div Newport News Shipbuilding |
| 2050965 PIECE 2,5ULTM1000 | 3/1 Design control — primary reference U.S. Government activity |
NSN 4820-01-366-2031 is a Parts Kit,ball Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-366-2031 has 2 manufacturer part numbers on file: 255551 PIECE 3 AND 4Q3 (Naval Inventory Control Point Mechanicsburg), 2050965 PIECE 2,5ULTM1000Q3 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 255551 PIECE 3 AND 4Q3: End Item Source: 80064; Criticality Code Justification: ZZZY; End Item Name: BALL VALVE; End Item Identification: 2050967. 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.