The Deck Box Operator,valve, cataloged under National Stock Number 4820-01-526-4835, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-526-4835 |
| Primary Part Number | 117-7550049-A4 |
| Item Name | Deck Box Operator,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Mechanical Connection Type | RIGID SHAFT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 117-7550049-A4 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7550049 | D/9 Drawing number reference only Naval Sea Systems Command |
| G766-1401-A4 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-526-4835 is a Deck Box Operator,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-526-4835 has 1 manufacturer part number on file: 117-7550049-A4 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-526-4843. Verify interchangeability with system specifications before substitution.
Key specifications for 117-7550049-A4: Mechanical Connection Type: RIGID SHAFT; 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.
NSN 4820-01-526-4835 has DEMIL Code Q. 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.