The Shaft,straight, cataloged under National Stock Number 3040-00-423-9294, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 13 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-423-9294 |
| Primary Part Number | 4B3494 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| FSC Application Data | STARTING ENGINE ASSY,POWER UNIT |
| Second End Hole Diameter | 0.1360 INCHES NOMINAL IN |
| First End Diameter | 0.4930 INCHES MINIMUM AND 0.4935 INCHES MAXIMUM IN |
| First End Distance From Keyway Center to End | 0.375 INCHES NOMINAL IN |
| Second End Diameter | 0.4930 INCHES MINIMUM AND 0.4935 INCHES MAXIMUM IN |
| First End Style | WOODRUFF KEYWAY |
| Material Document and Classification | QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Distance From Hole Center to End | 1.057 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | UNTHREADED CROSS DRILLED |
| Material | STEEL COMP 1018 |
| External Keyway Length | 0.500 INCHES NOMINAL FIRST END IN |
| First End Keyway Width | 0.9280 INCHES MINIMUM AND 0.9430 INCHES MAXIMUM 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 |
|---|---|
| 4B3494 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 3040-00-423-9294 is a Shaft,straight, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-423-9294 has 1 manufacturer part number on file: 4B3494 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4B3494: FSC Application Data: STARTING ENGINE ASSY,POWER UNIT; Second End Hole Diameter: 0.1360 INCHES NOMINAL IN; First End Diameter: 0.4930 INCHES MINIMUM AND 0.4935 INCHES MAXIMUM IN; First End Distance From Keyway Center to End: 0.375 INCHES NOMINAL IN. 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.
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.