The Shaft,shouldered, cataloged under National Stock Number 3040-01-348-1773, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-348-1773 |
| Primary Part Number | 123-4775356 ITEM 4L1 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Second End External Thread Length | 0.8750 INCHES NOMINAL IN |
| Step Quantity | 9 |
| First End Diameter | 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Second End Diameter | 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Largest Step Diameter | 2.000 INCHES NOMINAL IN |
| First End External Thread Length | 0.9500 INCHES NOMINAL IN |
| First End Style | EXTERNAL THREADED |
| Criticality Code Justification | ZZZY |
| Material Document and Classification | QQ-N-281,CL A,FORM 1 FED SPEC SINGLE MATERIAL RESPONSE |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNAL THREADED |
| Material | NICKEL ALLOY 400 |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| 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 |
|---|---|
| 123-4775356 ITEM 4L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 123-4775356 ITEM 4 | 3/1 Design control — primary reference U.S. Government activity |
NSN 3040-01-348-1773 is a Shaft,shouldered, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-348-1773 has 1 manufacturer part number on file: 123-4775356 ITEM 4L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 123-4775356 ITEM 4L1: Second End External Thread Length: 0.8750 INCHES NOMINAL IN; Step Quantity: 9; First End Diameter: 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Second End Diameter: 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM 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.