The Carrier,planet Gear, cataloged under National Stock Number 1680-01-178-3456, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-178-3456 |
| Item Name | Carrier,planet Gear |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| General Characteristics Item Description | 4340 STEEL PER AMS6414;HEAT TREAT ROCKWELL C40 MIN TO C45 MAX.;0.586 IN. LG O/A;1.812 IN. HUB DIA BY 0.469 IN. THK;51 INTERNAL INVOLUTE SLINE TEETHW/30.0 DEG PRESSURE ANGLE BY 1.5938 IN. PD BY 1.5630 IN. MINOR DIA BY 1.650 IN. MAJOR DIA BY 0.148 IN. DEEP 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 |
| Reference | Meaning |
|---|---|
| 722381 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1680-01-178-3456 is a Carrier,planet Gear, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-01-178-3456: General Characteristics Item Description: 4340 STEEL PER AMS6414;HEAT TREAT ROCKWELL C40 MIN TO C45 MAX.;0.586 IN. LG O/A;1.812 IN. HUB DIA BY 0.469 IN. THK;51 INTERNAL INVOLUTE SLINE TEETHW/30.0 DEG PRESSURE ANGLE BY 1.5938 IN. PD BY 1.5630 IN. MINOR DIA BY 1.650 IN. MAJOR DIA BY 0.148 IN. DEEP IN; End Item Identification: B-1B ACFT. 1 specification is 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 1680-01-178-3456 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.