The Collar,shaft, cataloged under National Stock Number 3040-00-346-7698, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 16 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 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 | 3040-00-346-7698 |
| Primary Part Number | 7666401 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Surface Finish | 125 MICROINCHES INSIDE PERIPHERY |
| Surface Finish | 125 MICROINCHES BOTH BEARING FLATS |
| Surface Finish | 125 MICROINCHES LARGEST OUTSIDE PERIPHERY |
| Surface Finish | 125 MICROINCHES SMALLEST OUTSIDE PERIPHERY |
| Securing Hole Type and Location | UNTHREADED SINGLE HOLE |
| Largest Diameter Length | 0.469 INCHES NOMINAL IN |
| Style Designator | ROUND STEPPED |
| Material Document and Classification | QQ-S-624, COMP 4150-CANCELED FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 2.125 INCHES NOMINAL IN |
| Hole Diameter and Location | 0.1250 INCHES NOMINAL SINGLE HOLE IN |
| Small End Diameter | 0.955 INCHES MINIMUM AND 0.960 INCHES MAXIMUM IN |
| Securing Hole Quantity | 1 |
| Surface Treatment | OXIDE |
| Bore Diameter | 0.5690 INCHES MINIMUM AND 0.5700 INCHES MAXIMUM IN |
| Material | STEEL COMP 4150 |
| Thickness | 1.187 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 |
|---|---|
| 7666401 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
NSN 3040-00-346-7698 is a Collar,shaft, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-346-7698 has 1 manufacturer part number on file: 7666401 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
1 possible match (shared part number, not a government interchangeability claim): 2915-01-087-4156. Verify interchangeability with system specifications before substitution.
Key specifications for 7666401: Surface Finish: 125 MICROINCHES INSIDE PERIPHERY; Surface Finish: 125 MICROINCHES BOTH BEARING FLATS; Surface Finish: 125 MICROINCHES LARGEST OUTSIDE PERIPHERY; Surface Finish: 125 MICROINCHES SMALLEST OUTSIDE PERIPHERY. 16 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.