The Shaft,straight, cataloged under National Stock Number 3040-01-398-1983, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rotary and Mission Systems. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-398-1983 |
| Primary Part Number | 165A637-1 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Lockheed Martin Corporation Div Rotary and Mission Systems |
| Status | ACTIVE |
| First End Diameter | 0.3750 INCHES NOMINAL IN |
| Second End Diameter | 0.2300 INCHES NOMINAL IN |
| Second End Spline Minor Diameter | 0.2190 INCHES MINIMUM IN |
| First End Style | CIRCULAR GROOVED |
| Second End Spline Major Diameter | 0.2500 INCHES MAXIMUM IN |
| End Similarity | NOT IDENTICAL |
| First End Distance From End to Groove | 0.1320 INCHES NOMINAL IN |
| Second End Spline Quantity | 19 |
| Second End Pressure Angle | 45.0 DEGREES NOMINAL |
| First End Groove Diameter | 0.3520 INCHES NOMINAL IN |
| Second End Style | SPLINED (INVOLUTE) |
| Material | STEEL COMP 303 |
| Second End Pitch Diameter | 0.2375 INCHES NOMINAL IN |
| First End Groove Width | 0.0290 INCHES NOMINAL IN |
| Second End Spline Length | 0.3320 INCHES NOMINAL 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 |
|---|---|
| 165A637-1 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| Reference | Meaning |
|---|---|
| 165A637 | D/9 Drawing number reference only Lockheed Martin Corporation Div Rotary and Mission Systems |
NSN 3040-01-398-1983 is a Shaft,straight, manufactured by Lockheed Martin Corporation Div Rotary and Mission Systems, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-398-1983 has 1 manufacturer part number on file: 165A637-1 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 165A637-1: First End Diameter: 0.3750 INCHES NOMINAL IN; Second End Diameter: 0.2300 INCHES NOMINAL IN; Second End Spline Minor Diameter: 0.2190 INCHES MINIMUM IN; First End Style: CIRCULAR GROOVED. 15 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.