The Shaft,shouldered, cataloged under National Stock Number 3040-01-438-3790, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Lake Shore Systems, Inc.. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-438-3790 |
| Primary Part Number | 2B1-1775-1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Lake Shore Systems, Inc. |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| Second End Hole Diameter | 0.2500 INCHES NOMINAL IN |
| Step Quantity | 4 |
| First End Diameter | 1.4365 INCHES NOMINAL IN |
| Second End Diameter | 1.2495 INCHES NOMINAL IN |
| Largest Step Diameter | 2.000 INCHES NOMINAL IN |
| First End Style | PLAIN |
| Material Document and Classification | QQ-S-763C-CL316 FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Groove Diameter | 1.1730 INCHES NOMINAL IN |
| Second End Distance From Hole Center to End | 0.594 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Groove Width | 0.1050 INCHES NOMINAL IN |
| Second End Distance From End to Groove | 0.1135 INCHES NOMINAL IN |
| Second End Style | CROSS DRILLED AND CIRCULAR GROOVED |
| Material | STEEL COMP 316 |
| 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 |
|---|---|
| 2D3-05667 ITEM 208 | Lake Shore Systems, Inc. (USA) |
| 2B1-1775-1 PRIMARY | Lake Shore Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2B1-1775 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
| 2D3-05667 | D/9 Drawing number reference only Lake Shore Systems, Inc. |
NSN 3040-01-438-3790 is a Shaft,shouldered, manufactured by Lake Shore Systems, Inc., classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-438-3790 has 2 manufacturer part numbers on file: 2D3-05667 ITEM 208 (Lake Shore Systems, Inc.), 2B1-1775-1 (Lake Shore Systems, Inc.).
Key specifications for 2B1-1775-1: Surface Finish: 125.0 MICROINCHES; Second End Hole Diameter: 0.2500 INCHES NOMINAL IN; Step Quantity: 4; First End Diameter: 1.4365 INCHES NOMINAL IN. 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.