The Insert,flexible Coupling, cataloged under National Stock Number 3010-01-385-1257, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Magnaloy Coupling Co Div of Douville-Johnston Corp. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 5 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3010-01-385-1257 |
| Primary Part Number | M170N6 |
| Item Name | Insert,flexible Coupling |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Magnaloy Coupling Co Div of Douville-Johnston Corp |
| Status | ACTIVE |
| Style Designator | JAW TYPE |
| Overall Outside Diameter | 2.600 INCHES NOMINAL 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 |
|---|---|
| M170N6 PRIMARY | Magnaloy Coupling Co Div of Douville-Johnston Corp (USA) |
| Reference | Meaning |
|---|---|
| 17-2-0230-1 | 7/2 Vendor item drawing reference U.S. Government activity |
| 170N | 5/9 Secondary reference Magnaloy Coupling Co Div of Douville-Johnston Corp |
| 101688 | D/9 Drawing number reference only Culver Fritz Inc |
NSN 3010-01-385-1257 is a Insert,flexible Coupling, manufactured by Magnaloy Coupling Co Div of Douville-Johnston Corp, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-385-1257 has 1 manufacturer part number on file: M170N6 (Magnaloy Coupling Co Div of Douville-Johnston Corp).
5 possible matches (shared part number, not a government interchangeability claim): 3010-01-385-1268, 3950-01-385-1279, 7025-01-544-2775. Verify interchangeability with system specifications before substitution.
Key specifications for M170N6: Style Designator: JAW TYPE; Overall Outside Diameter: 2.600 INCHES NOMINAL IN; Special Features: CHLOROPRENE RUBBER. 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.