The Coupling,shaft,spline, cataloged under National Stock Number 1680-01-181-4201, 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1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1680-01-181-4201 |
| Item Name | Coupling,shaft,spline |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL PER AMS5659,COMP XM-12;PASSIVATE PER PN14.10;3.358 IN. LG O/A;LEFT END-21 INTERNAL INVOLUTE SPLINE TEETH W/30.0 DEG PRESSURE ANGLE BY 0.833 IN. MINOR DIA BY 0.950 IN. MAJOR DIA BY 0.8750 IN. PD BY 1.250 IN. OD BY 2 0.219 IN. DIA HOLE THRU;RIGHT END-24 INTERNAL INVOLUTE SPLINE TEETH W/30.0 DEG PRESSURE ANGLE BY 0.958 IN. MINOR DIA BY 1.075 IN. MAJOR DIA BY 1.000 IN. PD BY 1.250 IN. OD BY 0.219 IN. DIA HOLES THRU 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 |
|---|---|
| 722158 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1680-01-181-4201 is a Coupling,shaft,spline, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-01-181-4201: General Characteristics Item Description: STEEL PER AMS5659,COMP XM-12;PASSIVATE PER PN14.10;3.358 IN. LG O/A;LEFT END-21 INTERNAL INVOLUTE SPLINE TEETH W/30.0 DEG PRESSURE ANGLE BY 0.833 IN. MINOR DIA BY 0.950 IN. MAJOR DIA BY 0.8750 IN. PD BY 1.250 IN. OD BY 2 0.219 IN. DIA HOLE THRU;RIGHT END-24 INTERNAL INVOLUTE SPLINE TEETH W/30.0 DEG PRESSURE ANGLE BY 0.958 IN. MINOR DIA BY 1.075 IN. MAJOR DIA BY 1.000 IN. PD BY 1.250 IN. OD BY 0.219 IN. DIA HOLES THRU 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 1680-01-181-4201 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.