The Insert,flexible Coupling, cataloged under National Stock Number 3010-01-351-8316, is classified within Federal Supply Class 3010 (Torque Converters and Speed Changers) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3010-01-351-8316 |
| Primary Part Number | 3556774/08/404 ITEM 6 |
| Item Name | Insert,flexible Coupling |
| FSC / FSG | 3010 / 30 — Torque Converters and Speed Changers |
| Manufacturer | Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment |
| Status | ACTIVE |
| Material | STEEL |
| 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 |
|---|---|
| 3549181 | Holset Engineering Co Ltd (GBR) |
| 3556774/08/404 ITEM 6 PRIMARY | Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment (USA) |
| 3574496/07/404 ITEM 21 | Renold Inc Div Ajax (USA) |
| Reference | Meaning |
|---|---|
| 3549181 | C/1 Advisory reference — outside the item-of-supply concept Holset Engineering Co Inc Sub of Cummins Engine Co |
| 3556774/08/404 | 5/1 Secondary reference Holset Engineering Co Ltd |
NSN 3010-01-351-8316 is a Insert,flexible Coupling, manufactured by Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment, classified under FSC 3010, Torque Converters and Speed Changers. Status: active.
NSN 3010-01-351-8316 has 3 manufacturer part numbers on file: 3549181 (Holset Engineering Co Ltd), 3556774/08/404 ITEM 6 (Curtis Engine & Equipment Company, Inc. Dba Curtis Engine & Equipment), 3574496/07/404 ITEM 21 (Renold Inc Div Ajax).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-351-8317. Verify interchangeability with system specifications before substitution.
Key specifications for 3556774/08/404 ITEM 6: End Item Identification: SPACER COUPLING,HOLSET,MODEL 825.5; Material: STEEL. 1 specification is 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.