The Shaft,straight, cataloged under National Stock Number 3040-01-044-3938, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 11 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-044-3938 |
| Primary Part Number | 423498-2 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co |
| Status | ACTIVE |
| 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 |
| 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 | 2.641 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 |
|---|---|
| 423498-2 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 423498-2 | U.s.a. Spares Inc. (USA) |
| 423498-2 | Fort Walton Machining Inc (USA) |
| 423498-2 | Nassau Tool Works, Inc (USA) |
| 423498-2 | Master Research & Manufacturing, Inc. Dba Master Research & Manufacturing Inc (USA) |
| 423498-2 | Krobach Mfg. Corp. Dba Krobach Manufacturing Corp (USA) |
| 423498-2 | Sky Usa Precision Manufacturing Llc (USA) |
| 423498-2 | Beaver Aerospace & Defense, Inc. (USA) |
| 423498-2 | Jmt Machine Company (USA) |
| 423498-2 | Pre-Mach Inc (USA) |
| 423498-2 | Duhadaway Tool & Die Shop Inc (USA) |
| Reference | Meaning |
|---|---|
| 423498-2 | 5/9 Secondary reference Luna Defense Systems, Inc |
| 423498-2 | 5/9 Secondary reference Laser Manufacturing Inc |
| 423498-2 | 3/2 Design control — primary reference U.S. Government activity |
| 423498-2 | 5/9 Secondary reference Ligi Tool & Engineering, Inc. |
NSN 3040-01-044-3938 is a Shaft,straight, manufactured by Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-044-3938 has 11 manufacturer part numbers on file: 423498-2 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 423498-2 (U.s.a. Spares Inc.), 423498-2 (Fort Walton Machining Inc), 423498-2 (Nassau Tool Works, Inc), 423498-2 (Master Research & Manufacturing, Inc. Dba Master Research & Manufacturing Inc) and 6 more.
Key specifications for 423498-2: 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. 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.