The Valve,butterfly, cataloged under National Stock Number 4820-01-413-7161, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Bollinger Shipyards Lockport, L.l.c. (CAGE 64513); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-413-7161 |
| Primary Part Number | 6736988 8IN PORT |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 259-6736988 8IN PORT | Bollinger Shipyards Lockport, L.l.c. (USA) |
| 6736988 8IN PORT | Bollinger Shipyards Lockport, L.l.c. (USA) |
| 6736988 8IN PORT PRIMARY | Naval Sea Systems Command (USA) |
| 6736974 FIND F9 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6736988 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-413-7161 is a Valve,butterfly, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-413-7161 has 4 manufacturer part numbers on file: 259-6736988 8IN PORT (Bollinger Shipyards Lockport, L.l.c.), 6736988 8IN PORT (Bollinger Shipyards Lockport, L.l.c.), 6736988 8IN PORT (Naval Sea Systems Command), 6736974 FIND F9 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4810-01-562-1275. Verify interchangeability with system specifications before substitution.
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.