The Ball and Seat Assembly, cataloged under National Stock Number 4820-01-118-6885, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-118-6885 |
| Item Name | Ball and Seat Assembly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY ASSURANCE TESTED FOR THE SUBMARINE SAFETY PROGRAM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| SS845-2050952 PIECE 2,5 | 5/1 Secondary reference U.S. Government activity |
| 2640-150 PIECE 3,7 | 5/1 Secondary reference U.S. Government activity |
| 2640-403X3 PIECE2,5 | 5/1 Secondary reference U.S. Government activity |
| 2640-402X3 PIECE2,5 | 5/1 Secondary reference U.S. Government activity |
| 2640-404X3 PIECE27,28 | 5/1 Secondary reference U.S. Government activity |
| SS845-2007651 PIECE 3, 7Q3 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| SS845-2050947 PIECE2,5 | 5/1 Secondary reference U.S. Government activity |
| SS845-2007651 PIECE 3,7 | 3/1 Design control — primary reference U.S. Government activity |
| SS845-2109805 PIECE 27,28 | 5/1 Secondary reference U.S. Government activity |
NSN 4820-01-118-6885 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): 4820-01-135-5492. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-118-6885: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: QUALITY ASSURANCE TESTED FOR THE SUBMARINE SAFETY PROGRAM. 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 4820-01-118-6885 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.