The Bell Crank, cataloged under National Stock Number 1680-01-004-1591, 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 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 1680-01-004-1591 |
| Primary Part Number | 160D121250-1 |
| Item Name | Bell Crank |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | CONTROL INSTALLATION,FUSELAGE,AIRFRAME |
| Bore Length | 2.218 INCHES NOMINAL IN |
| Bore Diameter | 0.875 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 160D121250-1 | Thomas Instrument, Incorporated (USA) |
| 160D121250-1 | Welding Metallurgy, Inc. (USA) |
| 160D121250-1 | Tens Machine Company, Inc. Dba Tens Machine Co Inc (USA) |
| 160D121250-1 | Bruder Industry (USA) |
| 160D121250-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 160D121250-1 | Capy Machine Shop Inc. Dba Capy Machine Shop Inc (USA) |
| 160D121250-1 | Northwest Machining & Mfg., Inc. Dba Northwest Machining & Manufacturing Inc (USA) |
| 160D121250-1 | Cpi Aerostructures Inc (USA) |
| 160D121250-1 | Aerometals, Inc. (USA) |
| 160D121250-1 | Design/ol, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 160D121250-3 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 160D121250-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 160D121250-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 1680-01-004-1591 is a Bell Crank, manufactured by Northrop Grumman Systems Corporation, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-004-1591 has 10 manufacturer part numbers on file: 160D121250-1 (Thomas Instrument, Incorporated), 160D121250-1 (Welding Metallurgy, Inc.), 160D121250-1 (Tens Machine Company, Inc. Dba Tens Machine Co Inc), 160D121250-1 (Bruder Industry), 160D121250-1 (Northrop Grumman Systems Corporation) and 5 more.
Key specifications for 160D121250-1: FSC Application Data: CONTROL INSTALLATION,FUSELAGE,AIRFRAME; Bore Length: 2.218 INCHES NOMINAL IN; Bore Diameter: 0.875 INCHES NOMINAL IN; Material: ALUMINUM ALLOY. 4 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 1680-01-004-1591 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.