The Coupling,shaft,flexible, cataloged under National Stock Number 3010-01-247-1558, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Senior Operations Llc Dba Metal Bellows Div Metal Bellows. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-247-1558 |
| Primary Part Number | 25859 |
| Item Name | Coupling,shaft,flexible |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Senior Operations Llc Dba Metal Bellows Div Metal Bellows |
| Status | ACTIVE |
| Securing Method | THREADED HOLE(S) BOTH ENDS |
| Threaded Hole Location | BOTH ENDS: 0.4844 IN. FROM END OF HUB 90 DEG APART IN |
| Bore Length | 0.6719 INCHES NOMINAL BOTH ENDS IN |
| Design Type | BELLOWS |
| Outside Diameter | 1.625 INCHES NOMINAL IN |
| Bore Shape | STRAIGHT BOTH ENDS |
| Threaded Hole Quantity | 2 BOTH ENDS |
| Thread Size Designator | 8-32 BOTH ENDS |
| Bellows Material | STEEL CORROSION RESISTING |
| Bore Diameter | 0.5000 INCHES NOMINAL SECOND END IN |
| Bore Diameter | 0.3750 INCHES NOMINAL FIRST END IN |
| Furnished Items and Quantity | SETSCREW 4 |
| 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 |
|---|---|
| 25859 PRIMARY | Senior Operations Llc Dba Metal Bellows Div Metal Bellows (USA) |
| STA-33 | Senior Operations Llc Dba Metal Bellows Div Metal Bellows (USA) |
| Reference | Meaning |
|---|---|
| STA-33 | 5/9 Secondary reference Senior Flexonics Inc |
| 25859 | 3/9 Design control — primary reference Senior Flexonics Inc |
NSN 3010-01-247-1558 is a Coupling,shaft,flexible, manufactured by Senior Operations Llc Dba Metal Bellows Div Metal Bellows, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-247-1558 has 2 manufacturer part numbers on file: 25859 (Senior Operations Llc Dba Metal Bellows Div Metal Bellows), STA-33 (Senior Operations Llc Dba Metal Bellows Div Metal Bellows).
1 possible match (shared part number, not a government interchangeability claim): 1650-01-594-1972. Verify interchangeability with system specifications before substitution.
Key specifications for 25859: Securing Method: THREADED HOLE(S) BOTH ENDS; Threaded Hole Location: BOTH ENDS: 0.4844 IN. FROM END OF HUB 90 DEG APART IN; Bore Length: 0.6719 INCHES NOMINAL BOTH ENDS IN; Design Type: BELLOWS. 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.