The Seawater Valve Kit, cataloged under National Stock Number 1355-01-033-4657, is classified within Federal Supply Class 1355 (Torpedos and Components, Inert) of the Ammunition and Explosives group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | Seawater Valve Kit |
| FSC / FSG | 1355 — Torpedos and Components, Inert (FSG 13) |
| Manufacturers | Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems (CAGE 77646) |
| Parameter | Value |
|---|---|
| NSN | 1355-01-033-4657 |
| Primary Part Number | 84577 |
| Item Name | Seawater Valve Kit |
| FSC / FSG | 1355 / 13 — Torpedos and Components, Inert |
| Manufacturer | Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 84577 PRIMARY | Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems (USA) |
NSN 1355-01-033-4657 is a Seawater Valve Kit, manufactured by Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems, classified under FSC 1355, Torpedos and Components, Inert. Status: active.
NSN 1355-01-033-4657 has 1 manufacturer part number on file: 84577 (Northrop Grumman Systems Corporation Dba Aerospace Systems Div Aeronautics Systems).
1 possible match (shared part number, not a government interchangeability claim): 1550-01-679-4281. 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.
NSN 1355-01-033-4657 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.