The Collar,shaft, cataloged under National Stock Number 3040-01-415-6631, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3040-01-415-6631 |
| Primary Part Number | 585-6406616-34 |
| Item Name | Collar,shaft |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125 MICROINCHES OVERALL |
| Securing Hole Type and Location | UNTHREADED ALL HOLES |
| Largest Diameter Length | 0.5250 INCHES NOMINAL IN |
| Style Designator | ROUND STEPPED |
| Material Document and Classification | QQ-N-281, CLASS A FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 3.620 INCHES NOMINAL IN |
| Hole Diameter and Location | 0.3770 INCHES NOMINAL ALL HOLES IN |
| Angle Between Centerlines of Securing Holes in Deg | 180.0 |
| Small End Diameter | 3.380 INCHES NOMINAL IN |
| Securing Hole Quantity | 2 |
| Bore Diameter | 2.7530 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 400 |
| Thickness | 1.500 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DF2081-237#34 | Naval Sea Systems Command (USA) |
| 585-6406616-34 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6406616 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 3040-01-415-6631 is a Collar,shaft, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-415-6631 has 2 manufacturer part numbers on file: DF2081-237#34 (Naval Sea Systems Command), 585-6406616-34 (Naval Sea Systems Command).
3 possible matches (shared part number, not a government interchangeability claim): 3040-01-415-6633, 3040-01-415-6639, 4820-01-415-7342. Verify interchangeability with system specifications before substitution.
Key specifications for 585-6406616-34: Surface Finish: 125 MICROINCHES OVERALL; Securing Hole Type and Location: UNTHREADED ALL HOLES; Largest Diameter Length: 0.5250 INCHES NOMINAL IN; Style Designator: ROUND STEPPED. 13 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.
NSN 3040-01-415-6631 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.