The Shaft Assembly,flexible, cataloged under National Stock Number 1680-00-309-1503, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 1680-00-309-1503 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| FSC Application Data | POWER UNIT ACTUATOR,ACFT |
| Width Across Flats | 0.750 INCHES NOMINAL SECOND END IN |
| Spline Type | INVOLUTE BOTH ENDS |
| Overall End Size | BOTH ENDS: 0.875 IN. W IN |
| Cross Section Size and Location | 0.406 INCHES NOMINAL DIAMETER SECOND END IN |
| Cross Section Size and Location | 0.470 INCHES NOMINAL DIAMETER FIRST END IN |
| End Overall Diameter | 0.885 INCHES NOMINAL FIRST END IN |
| End Connection Type | THREADED INTERNAL BOTH ENDS |
| Spline Length | 0.315 INCHES NOMINAL FIRST END IN |
| Spline Length | 0.258 INCHES NOMINAL SECOND END IN |
| Thread Depth | 0.313 INCHES NOMINAL SECOND END IN |
| Thread Depth | 0.375 INCHES NOMINAL FIRST END IN |
| Pitch Diameter | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Spline Major Diameter | 0.271 INCHES NOMINAL FIRST END IN |
| Spline Major Diameter | 0.299 INCHES NOMINAL SECOND END IN |
| Thread Location | INTERNAL BOTH ENDS |
| Core Diameter | 0.250 INCHES NOMINAL IN |
| Torsional Deflection Rating | 6 DEG FT-LB IN. |
| Thread Direction | RIGHT-HAND BOTH ENDS |
| Spline Pressure Angle in Deg | 14.500 SECOND END |
| Spline Pressure Angle in Deg | 20.0 FIRST END |
| Spline Quantity | 12 BOTH ENDS |
| Casing Length Between Ferrules | 50.130 INCHES NOMINAL IN |
| Core Rotation Direction | CLOCKWISE OR COUNTERCLOCKWISE |
| Core Removability | NONREMOVABLE |
| Core Overall Length | 52.255 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNS BOTH ENDS |
| Wrenching Facility Outside Diameter | 0.885 INCHES NOMINAL FIRST END IN |
| Thread Class | 2B BOTH ENDS |
| 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 |
|---|---|
| SF655X50-13 | 3/9 Design control — primary reference Walker-Turner Div of Rockwell Mfg Co |
NSN 1680-00-309-1503 is a Shaft Assembly,flexible, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-00-309-1503: FSC Application Data: POWER UNIT ACTUATOR,ACFT; Width Across Flats: 0.750 INCHES NOMINAL SECOND END IN; Spline Type: INVOLUTE BOTH ENDS; Overall End Size: BOTH ENDS: 0.875 IN. W IN. 29 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 1680-00-309-1503 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.