The Shaft,straight, cataloged under National Stock Number 3040-00-678-6427, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Smart Machines, Inc. Dba Barker and Williamson. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3040-00-678-6427 |
| Primary Part Number | 2B17-28 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Smart Machines, Inc. Dba Barker and Williamson |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| First End Diameter | 0.2490 INCHES NOMINAL IN |
| Second End Diameter | 0.2490 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Second End Groove Diameter | 0.2300 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.0280 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.065 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED |
| Material | STEEL COMP 303SE |
| 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 |
|---|---|
| 2B17-28 PRIMARY | Smart Machines, Inc. Dba Barker and Williamson (USA) |
| Reference | Meaning |
|---|---|
| 2B17-28 | 5/9 Secondary reference Barker & Williamson |
NSN 3040-00-678-6427 is a Shaft,straight, manufactured by Smart Machines, Inc. Dba Barker and Williamson, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-678-6427 has 1 manufacturer part number on file: 2B17-28 (Smart Machines, Inc. Dba Barker and Williamson).
1 possible match (shared part number, not a government interchangeability claim): 5365-01-184-3754. Verify interchangeability with system specifications before substitution.
Key specifications for 2B17-28: Surface Finish: 63.0 MICROINCHES; First End Diameter: 0.2490 INCHES NOMINAL IN; Second End Diameter: 0.2490 INCHES NOMINAL IN; First End Style: PLAIN. 10 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.