The Adapter,blower Input Drive, cataloged under National Stock Number 1680-01-474-1190, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-474-1190 |
| Item Name | Adapter,blower Input Drive |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Status | ACTIVE |
| Overall Diameter | 2.696 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 1680PL1300821 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| K874393-011 | 3/2 Design control — primary reference U.S. Government activity |
NSN 1680-01-474-1190 is a Adapter,blower Input Drive, classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
Key specifications for 1680-01-474-1190: Overall Diameter: 2.696 INCHES NOMINAL IN; Overall Length: 2.000 INCHES NOMINAL IN; Special Features: 4340 STEEL IS TO BE I.V.D. ALUMINUM COATED, THICKNESS ON SPLINE 0.0005 IN. MAX.; HEAT TREATED TO 160,000 PSI MINIMUM TENSILE STRENGTH RC 36-40; FLANGE END HAS FOUR EQUALLY SPACED MOUNTING HOLES 0.257-0.261 IN. DIA.; CIRCLE DIA. IS 2.376 IN.; SIDE RADIUS FROM FLANGE CENTER 1.0625 IN.; FLANGE THICKNESS 0.120 IN.; CENTER HOLE DIA. 0.405-0.410 IN.; FOUR HOLES 0.187-0.191 IN. DIA. ARE UNEQUALLY SPACED AROUND CENTER HOLE WITHIN A RECESSED AREA 1.450 IN. DIA.; END OPPOSITE FLANGE HAS OUTSIDE DIA. OF 1.855 IN. WITH 24 TOOTH INTERNAL INVOLUTE SPLINE; MINOR DIA. 1.438 IN.; MAJOR DIA. 1.629 IN. MAX. IN; Part Name Assigned by Controlling Agency: ADAPTER - FLANGED BLOWER INPUT DRIVE. 2 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.