The Test Set, cataloged under National Stock Number 4921-00-920-8521, 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 Northrop Grumman Systems Corporation. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Test Set |
| FSC / FSG | 4921 — Torpedo Maintenance, Repair, and Checkout Specialized Equipment (FSG 49) |
| Manufacturers | Northrop Grumman Systems Corporation (CAGE 70143); Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (CAGE 10001) |
| Parameter | Value |
|---|---|
| NSN | 4921-00-920-8521 |
| Primary Part Number | BUWEPSLM2541500 |
| Item Name | Test Set |
| FSC / FSG | 4921 / 49 — Torpedo Maintenance, Repair, and Checkout Specialized Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| BUWEPSLM2541500 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 2541500 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| LM2541500 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 4921-00-920-8521 is a Test Set, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4921, Torpedo Maintenance, Repair, and Checkout Specialized Equipment. Status: active.
NSN 4921-00-920-8521 has 2 manufacturer part numbers on file: BUWEPSLM2541500 (Northrop Grumman Systems Corporation), 2541500 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
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 4921-00-920-8521 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.