The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-409-7989, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Designatronics Incorporated Div Sterling Instruments Div. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-00-409-7989 |
| Primary Part Number | S9901Z-G406-03 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Designatronics Incorporated Div Sterling Instruments Div |
| Status | ACTIVE |
| Securing Method | THREADED HOLE(S) FIRST END |
| Threaded Hole Location | BOTH ENDS: 2 HOLES LOCATED AT 120 DEG ANGLE |
| Bore Length | 0.2500 INCHES NOMINAL FIRST END IN |
| Design Type | BELLOWS |
| Criticality Code Justification | FEAT |
| Spline Major Diameter | 0.2500 INCHES NOMINAL BOTH ENDS IN |
| Outside Diameter | 0.468 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT FIRST END |
| Bore Shape | SPLINED SECOND END |
| Spline Quantity | 1 BOTH ENDS |
| Threaded Hole Quantity | 2 BOTH ENDS |
| Thread Size Designator | NO. 4-40 THD SIZE BOTH ENDS |
| Bellows Material | COPPER ALLOY |
| Width | 0.468 INCHES NOMINAL IN |
| Bore Diameter | 0.1873 INCHES NOMINAL FIRST END IN |
| Furnished Items and Quantity | SETSCREWS 2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| S9901Z-G406-03 PRIMARY | Designatronics Incorporated Div Sterling Instruments Div (USA) |
| Reference | Meaning |
|---|---|
| 10682479 | 7/2 Vendor item drawing reference Us Army Aviation and Missile Command |
| G406-3 | 5/9 Secondary reference Designatronics Incorporated Div Sterling Instruments Div |
NSN 3010-00-409-7989 is a Coupling,shaft,flexible, manufactured by Designatronics Incorporated Div Sterling Instruments Div, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-409-7989 has 1 manufacturer part number on file: S9901Z-G406-03 (Designatronics Incorporated Div Sterling Instruments Div).
1 possible match (shared part number, not a government interchangeability claim): 6685-01-300-7919. Verify interchangeability with system specifications before substitution.
Key specifications for S9901Z-G406-03: Securing Method: THREADED HOLE(S) FIRST END; Threaded Hole Location: BOTH ENDS: 2 HOLES LOCATED AT 120 DEG ANGLE; Bore Length: 0.2500 INCHES NOMINAL FIRST END IN; Design Type: BELLOWS. 16 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.