The Mounting Block Assembly, cataloged under National Stock Number 5925-01-167-4783, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Mounting Block Assembly |
| FSC / FSG | 5925 — Circuit Breakers (FSG 59) |
| Manufacturers | L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (CAGE 30086); L-3 Communications Westwood Corporation Dba Nmp Division Div L3 Westwood Corporation (CAGE 58475) |
| Parameter | Value |
|---|---|
| NSN | 5925-01-167-4783 |
| Primary Part Number | ETN6743 |
| Item Name | Mounting Block Assembly |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| ETN6743 PRIMARY | L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. (USA) |
| 6-4047-101A | L-3 Communications Westwood Corporation Dba Nmp Division Div L3 Westwood Corporation (USA) |
| Reference | Meaning |
|---|---|
| 303-31-001 | C/1 Advisory reference — outside the item-of-supply concept L-3 Communications Westwood Corporation Dba Nmp Division Div L3 Westwood Corporation |
| ETN-6743 | C/1 Advisory reference — outside the item-of-supply concept L-3 Communications Westwood Corporation Dba Nmp Division Div L3 Westwood Corporation |
NSN 5925-01-167-4783 is a Mounting Block Assembly, manufactured by L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc., classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-167-4783 has 2 manufacturer part numbers on file: ETN6743 (L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc.), 6-4047-101A (L-3 Communications Westwood Corporation Dba Nmp Division Div L3 Westwood Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-494-7439. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). 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.