The Bell Crank, cataloged under National Stock Number 1680-01-021-0393, 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. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 10 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-021-0393 |
| Primary Part Number | 160D521117-17 |
| Item Name | Bell Crank |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 3.625 INCHES NOMINAL FIRST END IN |
| Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball | 4.560 INCHES NOMINAL SECOND END IN |
| End Hole/ball Diameter | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST END IN |
| End Hole/ball Diameter | 0.437 INCHES MINIMUM AND 0.438 INCHES MAXIMUM SECOND END IN |
| FSC Application Data | CONTROL INSTALLATION,FUSELAGE,AIRFRAME |
| Bore Length | 2.080 INCHES NOMINAL IN |
| Bore Diameter | 0.625 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 160D521117-17 | Aerometals, Inc. (USA) |
| 160D521117-17 | Thomas Instrument, Incorporated (USA) |
| 160D521117-17 | Capy Machine Shop Inc. Dba Capy Machine Shop Inc (USA) |
| 160D521117-17 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 160D521117-17 | Cpi Aerostructures Inc (USA) |
| 160D521117-17 | Prodyne Inc (USA) |
| 160D521117-17 | Welding Metallurgy, Inc. (USA) |
| 160D521117-17 | Tens Machine Company, Inc. Dba Tens Machine Co Inc (USA) |
| 160D521117-17 | Design/ol, Inc. (USA) |
| 160D521117-17 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 160D52117-13 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 160D521117-17 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| 160D521117-17 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 1680-01-021-0393 is a Bell Crank, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-021-0393 has 10 manufacturer part numbers on file: 160D521117-17 (Aerometals, Inc.), 160D521117-17 (Thomas Instrument, Incorporated), 160D521117-17 (Capy Machine Shop Inc. Dba Capy Machine Shop Inc), 160D521117-17 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 160D521117-17 (Cpi Aerostructures Inc) and 5 more.
Key specifications for 160D521117-17: Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 3.625 INCHES NOMINAL FIRST END IN; Center to Center Distance Between Fulcrum and Arm End Hole/slot/ball: 4.560 INCHES NOMINAL SECOND END IN; End Hole/ball Diameter: 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM FIRST END IN; End Hole/ball Diameter: 0.437 INCHES MINIMUM AND 0.438 INCHES MAXIMUM SECOND END IN. 7 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.
NSN 1680-01-021-0393 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.