The Retainer,disk,valve, cataloged under National Stock Number 4820-01-233-8082, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Grove Valve Operations. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-233-8082 |
| Primary Part Number | S-34028-1 |
| Item Name | Retainer,disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Grove Valve Operations |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| N-928 PIECE 21B | Grove Valve Operations (USA) |
| S-34028-1 PRIMARY | Grove Valve Operations (USA) |
| Reference | Meaning |
|---|---|
| N-928 | D/9 Drawing number reference only Grove Valve Operations |
| 5-34028-1 | 5/9 Secondary reference Grove Valve Operations |
NSN 4820-01-233-8082 is a Retainer,disk,valve, manufactured by Grove Valve Operations, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-233-8082 has 2 manufacturer part numbers on file: N-928 PIECE 21B (Grove Valve Operations), S-34028-1 (Grove Valve Operations).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-247-0484. Verify interchangeability with system specifications before substitution.
Key specifications for S-34028-1: Material: STEEL CORROSION RESISTING. 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.