The Shaft,shouldered, cataloged under National Stock Number 3040-00-790-2689, is classified within Federal Supply Class 3040 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Coffin Turbo Pump Inc. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-790-2689 |
| Primary Part Number | 3704 |
| Item Name | Shaft,shouldered |
| FSC / FSG | 3040 / 30 — No Item Name Available |
| Manufacturer | Coffin Turbo Pump Inc |
| Status | ACTIVE |
| First End Hole Depth | 1.186 INCHES NOMINAL IN |
| First End Style | CROSS DRILLED AND EXTERNALLY THREADED |
| External Keyway Length | 1.375 INCHES NOMINAL SECOND END IN |
| Second End Distance From Keyway Center to End | 2.750 INCHES NOMINAL IN |
| First End Distance From Hole Center to End | 3.125 INCHES NOMINAL IN |
| First End Hole Diameter | 0.2500 INCHES NOMINAL IN |
| Second End Keyway Width | 0.2500 INCHES NOMINAL IN |
| Second End Diameter | 1.3040 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.138 INCHES NOMINAL IN |
| Second End External Thread Length | 1.188 INCHES NOMINAL IN |
| First End Diameter | 1.1860 INCHES NOMINAL IN |
| Material | STEEL |
| Step Quantity | 6 |
| Largest Step Diameter | 1.497 INCHES NOMINAL IN |
| First End External Thread Length | 1.500 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | EXTERNALLY THREADED AND INDENTED FLAT KEYWAY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 3040-00-790-2689 is a Shaft,shouldered, manufactured by Coffin Turbo Pump Inc, classified under FSC 3040 (No Item Name Available). Status: active.
NSN 3040-00-790-2689 has 2 cross-referenced part numbers: 3704 (Coffin Turbo Pump Inc), 3704 (Fmc Corp).
There are 12 known substitutes for 3040-00-790-2689: 4730-00-475-8593, 3020-00-528-0557, 2805-00-535-6678 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 3704: First End Hole Depth: 1.186 INCHES NOMINAL IN; First End Style: CROSS DRILLED AND EXTERNALLY THREADED; External Keyway Length: 1.375 INCHES NOMINAL SECOND END IN; Second End Distance From Keyway Center to End: 2.750 INCHES NOMINAL IN. 18 total characteristics are documented in the Federal Logistics Information System.