The Collar,upper,torque Arm,landing, cataloged under National Stock Number 1620-00-007-1787, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 7 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-00-007-1787 |
| Primary Part Number | 14-41611-501 |
| Item Name | Collar,upper,torque Arm,landing |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| Status | ACTIVE |
| FSC Application Data | LANDING GEAR,RETRACTABLE |
| General Characteristics Item Description | STEEL NAI 1273 GRADE B 4340,7.240 IN. O/A LG,5.748 IN. MIN 5.750IN. MAX O/A W,2.310 IN. MIN 2.320 IN. MAX O/A H,NOTED MACHINEDSURFACES 32 63 125 MICROINCH FINISH,NICKEL PLATE CLASS 20.0004-0.00006 THK,HEAT TREAT 180000 TO 200000 PSI,COMPONENT 2BUSHING NO. 14-41685-21 IN |
| Criticality Code Justification | FEAT |
| Reference Data and Literature | T.O.4S2-75-4 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 14-41611-501 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 14-41611-501 | Heroux-Devtek Inc (CAN) |
| 14-41611-501 | Triumph Actuation Systems - Connecticut, Llc (USA) |
| 14-41611-501 | Cummins Aerospace, Llc Dba Cummins Aerospace Llc (USA) |
| 14-41611-501 | Circor Aerospace, Inc. Div Circor (USA) |
| 14-41611-501 | May Tool and Mold Co., Inc. Dba May Technology & Mfg., Inc. (USA) |
| 14-41611-501 | Machine Specialties, Llc (USA) |
| Reference | Meaning |
|---|---|
| 14-41611-501 | 5/9 Secondary reference Systems Architects Inc Washington Operation |
| 14-41611-501 | 5/9 Secondary reference U.S. Government activity |
| 14-41611-501 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 14-41611-501 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 14-41611-501 | 5/2 Secondary reference U.S. Government activity |
| 14-41611-501 | 5/9 Secondary reference Cagas Precision & Research Corp |
| 14-41611-501 | 5/9 Secondary reference Logistical Support Llc |
| 14-41611-501 | 5/9 Secondary reference Transaero, Inc. |
| 14-41611-501 | 5/9 Secondary reference Jensen-Kelly Machine Products |
NSN 1620-00-007-1787 is a Collar,upper,torque Arm,landing, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-00-007-1787 has 7 manufacturer part numbers on file: 14-41611-501 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 14-41611-501 (Heroux-Devtek Inc), 14-41611-501 (Triumph Actuation Systems - Connecticut, Llc), 14-41611-501 (Cummins Aerospace, Llc Dba Cummins Aerospace Llc), 14-41611-501 (Circor Aerospace, Inc. Div Circor) and 2 more.
Key specifications for 14-41611-501: FSC Application Data: LANDING GEAR,RETRACTABLE; General Characteristics Item Description: STEEL NAI 1273 GRADE B 4340,7.240 IN. O/A LG,5.748 IN. MIN 5.750IN. MAX O/A W,2.310 IN. MIN 2.320 IN. MAX O/A H,NOTED MACHINEDSURFACES 32 63 125 MICROINCH FINISH,NICKEL PLATE CLASS 20.0004-0.00006 THK,HEAT TREAT 180000 TO 200000 PSI,COMPONENT 2BUSHING NO. 14-41685-21 IN; Criticality Code Justification: FEAT; Reference Data and Literature: T.O.4S2-75-4. 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 1620-00-007-1787 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.