The Ball and Seat Assembly, cataloged under National Stock Number 4820-01-134-9857, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-134-9857 |
| Item Name | Ball and Seat Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 2640-503 PIECE 2,6 | 5/1 Secondary reference U.S. Government activity |
| SS845-1968265 PIECE 2,6 | 3/1 Design control — primary reference U.S. Government activity |
| 2640-503 PIECE 2,6QA | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| SS845-1968265 PIECE 2,6QA | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
NSN 4820-01-134-9857 is a Ball and Seat Assembly, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-142-2290. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-134-9857: End Item Identification: VARIOUS SUBMARINE PUMPS. 0 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.