The Ball and Seat Assembly, cataloged under National Stock Number 4820-01-090-4667, 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 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-090-4667 |
| Primary Part Number | H547-0001-2640511-48,57Q3 |
| Item Name | Ball and Seat Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | ITEMS THAT SUPPORT A LEVEL I OR SUBSAFE CRITICAL SYSTEM/COMPONENT THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS AND REQUIRES OBJECTIVE QUALITY EVIDENCE (OQE) TRACEABLE TO PERMANENT MARKING ON THE MATERIAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| H547-0001-2640511-48,57Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-11 ITEM48,57Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7383858-264140511-48,57Q3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-11 ITEM48,57 1-4INQ3 | Naval Inventory Control Point Mechanicsburg (USA) |
| 2641-405-11 ITEM48,57 1-2INQ3 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2641-405-11 ITEM 48,57 1-2IN | 5/1 Secondary reference U.S. Government activity |
| 2641-809-41IT262640-801X2PC3 | 3/1 Design control — primary reference U.S. Government activity |
| 2641-405-11 ITEM 48,57 | 5/1 Secondary reference U.S. Government activity |
| 7383858-264140511-48,57 | 5/1 Secondary reference Naval Sea Systems Command |
| H547-0001-2640511-48,57 | 5/1 Secondary reference U.S. Government activity |
| 2641-809-41IT262640-801X2PC3Q3 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2641-405-11 ITEM 48,57 1-4IN | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-090-4667 is a Ball and Seat Assembly, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-090-4667 has 5 manufacturer part numbers on file: H547-0001-2640511-48,57Q3 (Naval Inventory Control Point Mechanicsburg), 2641-405-11 ITEM48,57Q3 (Naval Inventory Control Point Mechanicsburg), 7383858-264140511-48,57Q3 (Naval Inventory Control Point Mechanicsburg), 2641-405-11 ITEM48,57 1-4INQ3 (Naval Inventory Control Point Mechanicsburg), 2641-405-11 ITEM48,57 1-2INQ3 (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-633-3651. Verify interchangeability with system specifications before substitution.
Key specifications for H547-0001-2640511-48,57Q3: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: ITEMS THAT SUPPORT A LEVEL I OR SUBSAFE CRITICAL SYSTEM/COMPONENT THAT HAS UNDERGONE QUALITY ASSURANCE DURING THE ACQUISITION PROCESS AND REQUIRES OBJECTIVE QUALITY EVIDENCE (OQE) TRACEABLE TO PERMANENT MARKING ON THE MATERIAL. 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 4820-01-090-4667 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.