The Shaft,straight, cataloged under National Stock Number 3040-01-044-3939, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Nassau Tool Works, Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-044-3939 |
| Primary Part Number | 423498-3 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Nassau Tool Works, Inc |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES |
| FSC Application Data | CATAPULT SYSTEM LAUNCHING SHUTTLE |
| First End Diameter | 1.9950 INCHES NOMINAL IN |
| Second End Diameter | 1.9950 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Criticality Code Justification | FEAT |
| Second End Groove Diameter | 1.6250 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.3590 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 3.891 INCHES NOMINAL IN |
| Second End Style | CIRCULAR GROOVED |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 423498-3 | Nassau Tool Works, Inc (USA) |
| 423498-3 | Duhadaway Tool & Die Shop Inc (USA) |
| 423498-3 | Beaver Aerospace & Defense, Inc. (USA) |
| 423498-3 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| 423498-3 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 423498-3 | Sky Usa Precision Manufacturing Llc (USA) |
| 423498-3 | Fort Walton Machining Inc (USA) |
| 423498-3 | Pre-Mach Inc (USA) |
| 423498-3 | U.s.a. Spares Inc. (USA) |
| Reference | Meaning |
|---|---|
| 423498-3 | 5/9 Secondary reference Computa-Base-Machining, Inc. |
| 423498-3 | 3/2 Design control — primary reference U.S. Government activity |
| 423498-3 | 5/9 Secondary reference Master Research & Manufacturing, Inc. Dba Master Research & Manufacturing Inc |
| 423498-3 | 5/9 Secondary reference Ligi Tool & Engineering, Inc. |
| 423498-3 | 5/9 Secondary reference Laser Manufacturing Inc |
NSN 3040-01-044-3939 is a Shaft,straight, manufactured by Nassau Tool Works, Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-044-3939 has 9 manufacturer part numbers on file: 423498-3 (Nassau Tool Works, Inc), 423498-3 (Duhadaway Tool & Die Shop Inc), 423498-3 (Beaver Aerospace & Defense, Inc.), 423498-3 (Krobach Mfg. Corp. Dba Krobach Manufacturing Corp), 423498-3 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co) and 4 more.
Key specifications for 423498-3: Surface Finish: 63.0 MICROINCHES; FSC Application Data: CATAPULT SYSTEM LAUNCHING SHUTTLE; First End Diameter: 1.9950 INCHES NOMINAL IN; Second End Diameter: 1.9950 INCHES NOMINAL IN. 12 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.