The Weight Assy,ballast, cataloged under National Stock Number 4921-00-604-9380, is classified within Federal Supply Class 4921 (Torpedo Maintenance, Repair, and Checkout Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Weight Assy,ballast |
| FSC / FSG | 4921 — Torpedo Maintenance, Repair, and Checkout Specialized Equipment (FSG 49) |
| Manufacturers | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (CAGE 10001) |
| Parameter | Value |
|---|---|
| NSN | 4921-00-604-9380 |
| Primary Part Number | 815738 |
| Item Name | Weight Assy,ballast |
| FSC / FSG | 4921 / 49 — Torpedo Maintenance, Repair, and Checkout Specialized Equipment |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 815738 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 4921-00-604-9380 is a Weight Assy,ballast, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4921, Torpedo Maintenance, Repair, and Checkout Specialized Equipment. Status: active.
NSN 4921-00-604-9380 has 1 manufacturer part number on file: 815738 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
2 possible matches (shared part number, not a government interchangeability claim): 5360-00-889-7550, 4820-01-435-9058. 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.