The Shaft Assembly,flexible, cataloged under National Stock Number 6680-00-679-4635, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 26 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-00-679-4635 |
| Item Name | Shaft Assembly,flexible |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Status | ACTIVE |
| FSC Application Data | TACHOMETER,MECHANICAL,FIXED MOUNTING |
| Cross Section Size and Location | 0.104 INCHES NOMINAL ACROSS FLATS BOTH ENDS IN |
| End Overall Diameter | 1.000 INCHES NOMINAL BOTH ENDS IN |
| End Connection Type | THREADED INTERNAL BOTH ENDS |
| Thread Depth | 0.250 INCHES NOMINAL BOTH ENDS IN |
| Thread Location | INTERNAL BOTH ENDS |
| Core Diameter | 0.130 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND BOTH ENDS |
| Casing Length Between Ferrules | 103.000 INCHES NOMINAL IN |
| Core Rotation Direction | CLOCKWISE |
| Core Removability | REMOVABLE |
| Core Overall Length | 104.000 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNS BOTH ENDS |
| Surface Treatment | CADMIUM CORE |
| Surface Treatment | ZINC CASING |
| Protective Coating Method | COATED CASING |
| Wrenching Facility Outside Diameter | 0.875 INCHES NOMINAL BOTH ENDS IN |
| Thread Class | 2B FIRST END |
| Thread Class | 2B SECOND END |
| Wrenching Facility Type | KNURLED SURFACE BOTH ENDS |
| Material | STEEL CORE |
| Material | STEEL CASING |
| Casing Outside Diameter | 0.243 INCHES NOMINAL IN |
| Minimum Operating Radius | 3.000 INCHES IN |
| End Type | ROUND KEYED BOTH ENDS |
| Tip Length | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 446140 | 5/9 Secondary reference Stewart-Warner Corporation |
| 446140-98 | 3/9 Design control — primary reference Stewart-Warner Corporation |
NSN 6680-00-679-4635 is a Shaft Assembly,flexible, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5930-01-425-0265. Verify interchangeability with system specifications before substitution.
Key specifications for 6680-00-679-4635: FSC Application Data: TACHOMETER,MECHANICAL,FIXED MOUNTING; Cross Section Size and Location: 0.104 INCHES NOMINAL ACROSS FLATS BOTH ENDS IN; End Overall Diameter: 1.000 INCHES NOMINAL BOTH ENDS IN; End Connection Type: THREADED INTERNAL BOTH ENDS. 26 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.
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.