The Tool Assembly,ball Valve, cataloged under National Stock Number 4820-01-550-2145, 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 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-550-2145 |
| Primary Part Number | 7550479-7108102-TA |
| Item Name | Tool Assembly,ball Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Functional Classification | USED FOR REPAIR OF 4 INCH BALL VALVE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 845-7108102-TA | Naval Inventory Control Point Mechanicsburg (USA) |
| 7550479-7108102-TA PRIMARY | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 7108102-TA | 5/2 Secondary reference U.S. Government activity |
| G547-0003-7108102-TA | 5/2 Secondary reference U.S. Government activity |
| 7108102 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-550-2145 is a Tool Assembly,ball Valve, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-550-2145 has 2 manufacturer part numbers on file: 845-7108102-TA (Naval Inventory Control Point Mechanicsburg), 7550479-7108102-TA (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-727-8336. Verify interchangeability with system specifications before substitution.
Key specifications for 7550479-7108102-TA: Functional Classification: USED FOR REPAIR OF 4 INCH BALL VALVE IN; End Item Identification: OHIO CLASS SSBN (TRIDENT). 1 specification is 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.