The Coupling,shaft,flexible, cataloged under National Stock Number 3010-01-216-2640, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Flowserve Corp Dba Automax Actuators Div Flowserve Us Company. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-01-216-2640 |
| Primary Part Number | B-684351 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company |
| Status | ACTIVE |
| Design Type | INTERNAL GEAR |
| Outside Diameter | 3.938 INCHES NOMINAL IN |
| Features Provided | KEYWAY AND EXPOSED COUPLING BOLT TYPE |
| Bore Shape | STRAIGHT BOTH ENDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B-684351 PRIMARY | Flowserve Corp Dba Automax Actuators Div Flowserve Us Company (USA) |
| Reference | Meaning |
|---|---|
| B-684351 | 5/9 Secondary reference Timken Gears & Services Inc. Div Philadelphia Gear |
NSN 3010-01-216-2640 is a Coupling,shaft,flexible, manufactured by Flowserve Corp Dba Automax Actuators Div Flowserve Us Company, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-216-2640 has 1 manufacturer part number on file: B-684351 (Flowserve Corp Dba Automax Actuators Div Flowserve Us Company).
Key specifications for B-684351: Design Type: INTERNAL GEAR; Overall Length: 3.000 INCHES NOMINAL IN; Outside Diameter: 3.938 INCHES NOMINAL IN; Features Provided: KEYWAY AND EXPOSED COUPLING BOLT TYPE. 4 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.