The Coupling,shaft,flexible, cataloged under National Stock Number 3010-00-253-9804, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Circor Pumps North America Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-00-253-9804 |
| Primary Part Number | SCS681 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Circor Pumps North America Llc |
| Status | ACTIVE |
| Keyway Depth | 0.2550 INCHES NOMINAL BOTH ENDS IN |
| Bore Length | 2.3750 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM THROUGH BORE IN |
| Key Width | 0.500 INCHES NOMINAL BOTH ENDS IN |
| Design Type | INTERNAL GEAR |
| Taper Minor Diameter | 1.8710 INCHES NOMINAL BOTH ENDS IN |
| Keying Facility Type | KEYWAY BOTH ENDS |
| Outside Diameter | 7.000 INCHES NOMINAL IN |
| Counterbore Depth | 0.1250 INCHES MINIMUM AND 0.9380 INCHES MAXIMUM THROUGH BORE IN |
| Features Provided | KEYWAY AND COUNTERBORE AND EXPOSED COUPLING BOLT TYPE AND VERTICAL GRID SPRING AND SHROUDED COUPLING BOLT TYPE |
| Bore Shape | TAPERED BOTH ENDS |
| Keying Facility Quantity | 1 BOTH ENDS |
| Counterbore Diameter | 3.3750 INCHES MINIMUM AND 4.5000 INCHES MAXIMUM THROUGH BORE IN |
| 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 |
|---|---|
| SCS681 PRIMARY | Circor Pumps North America Llc (USA) |
| SG2414PC27 PRIMARY | Circor Pumps North America Llc (USA) |
| 2SCS681 PRIMARY | Circor Pumps North America Llc (USA) |
| Reference | Meaning |
|---|---|
| SG2414PC27 | 5/9 Secondary reference Siemens Energy, Inc. |
| 2SCS681 | 5/9 Secondary reference Siemens Energy, Inc. |
| A28432A | 5/9 Secondary reference Reliance Electric Industrial Co Master-Reeves Div |
| SCS681 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 3010-00-253-9804 is a Coupling,shaft,flexible, manufactured by Circor Pumps North America Llc, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-00-253-9804 has 3 manufacturer part numbers on file: SCS681 (Circor Pumps North America Llc), SG2414PC27 (Circor Pumps North America Llc), 2SCS681 (Circor Pumps North America Llc).
Key specifications for SCS681: Keyway Depth: 0.2550 INCHES NOMINAL BOTH ENDS IN; Bore Length: 2.3750 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM THROUGH BORE IN; Key Width: 0.500 INCHES NOMINAL BOTH ENDS IN; Design Type: INTERNAL GEAR. 12 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.