The Relay Box,power,ac, cataloged under National Stock Number 1680-01-039-9931, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-039-9931 |
| Primary Part Number | 160D180521-1 |
| Item Name | Relay Box,power,ac |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| 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 |
|---|---|
| 160D180521-1 | East/west Industries, Inc. (USA) |
| 160D180521-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 160D180521-1 | Welding Metallurgy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 160D180521-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 160D180521-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 1680-01-039-9931 is a Relay Box,power,ac, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-039-9931 has 3 manufacturer part numbers on file: 160D180521-1 (East/west Industries, Inc.), 160D180521-1 (Northrop Grumman Systems Corporation), 160D180521-1 (Welding Metallurgy, Inc.).
Key specifications for 160D180521-1: End Item Identification: A-10A ACFT A. 0 specifications are documented in the U.S. Government catalog.
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.