The Parts Kit,ball Valve, cataloged under National Stock Number 4820-01-221-4372, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-01-221-4372 |
| Primary Part Number | 2641-405-01 ITEM 40,63VG |
| Item Name | Parts Kit,ball Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | CANCELLED |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | EQUIPMENT AND/OR PARTS REQUIRING SPECIAL MATERIAL CONTROL AND QUALITY ASSURANCE WHICH SUPPORT SURFACE OR SUBMARINE APPLICATION. SPECIAL CLEANING AND PACKAGING FOR OXYGEN/HYDROGEN SERVICE IS REQUIRED |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2641-405-01 ITEM 40,63VG | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-809-41IM2X2640-801X2PC3VG | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2641-809-41IM2X2640-801X2PC3 | 3/1 Design control — primary reference U.S. Government activity |
| 2641-405-01 ITEM 40,63 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-221-4372 is a Parts Kit,ball Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: cancelled.
NSN 4820-01-221-4372 has 2 manufacturer part numbers on file: 2641-405-01 ITEM 40,63VG (Naval Inventory Control Point Mechanicsburg), 2641-809-41IM2X2640-801X2PC3VG (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-649-4645. Verify interchangeability with system specifications before substitution.
Key specifications for 2641-405-01 ITEM 40,63VG: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: EQUIPMENT AND/OR PARTS REQUIRING SPECIAL MATERIAL CONTROL AND QUALITY ASSURANCE WHICH SUPPORT SURFACE OR SUBMARINE APPLICATION. SPECIAL CLEANING AND PACKAGING FOR OXYGEN/HYDROGEN SERVICE IS REQUIRED. 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 4820-01-221-4372 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
NSN 4820-01-221-4372 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.