The Connecting Rod Assembly, cataloged under National Stock Number 3040-01-493-2840, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 3040-01-493-2840 |
| Primary Part Number | 566-6985431-A3 |
| Item Name | Connecting Rod Assembly |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Accessory Components and Quantity | ROD, CONNECTING, PART 41 (MFR NO. H6230503A-41), NSN 3040-01-493-2789, 1; PIN, TILLER, PART 42 (MFR NO. 36-37-78968), 1; PIN, CROSSHEAD, PART 43 (MFR NO. 36-37-78968), 1; BEARING, THRUST, PART 44 (MFR NO. H6230503A-44), 4; NUT (MFR NO. 36-01-7896), 1; BEARING JOURNAL, PL (MFR NO. H6230503A-46), 2; BEARING JOURNAL, PL (MRF NO. H6230503A-47), 2 |
| Functional Description | STEAR DIVE GEAR STARBOARD OPERATING GEAR ASSEMBLY |
| Material | NICKEL ALLOY AND COPPER AND ALUMINUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| H623-0503-A3 | Naval Sea Systems Command (USA) |
| 566-6985431-A3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H623-0503 | D/9 Drawing number reference only Naval Sea Systems Command |
| H623-0503-A3 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-01-493-2840 is a Connecting Rod Assembly, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-493-2840 has 2 manufacturer part numbers on file: H623-0503-A3 (Naval Sea Systems Command), 566-6985431-A3 (Naval Sea Systems Command).
Key specifications for 566-6985431-A3: Overall Length: 127.540 INCHES NOMINAL IN; Accessory Components and Quantity: ROD, CONNECTING, PART 41 (MFR NO. H6230503A-41), NSN 3040-01-493-2789, 1; PIN, TILLER, PART 42 (MFR NO. 36-37-78968), 1; PIN, CROSSHEAD, PART 43 (MFR NO. 36-37-78968), 1; BEARING, THRUST, PART 44 (MFR NO. H6230503A-44), 4; NUT (MFR NO. 36-01-7896), 1; BEARING JOURNAL, PL (MFR NO. H6230503A-46), 2; BEARING JOURNAL, PL (MRF NO. H6230503A-47), 2; Special Features: THE CONNECTING ROD ASSEMBLY, A3, SHEET 9, SECTION 4B, CANNOT BE FULLY ASSEMBLED UNTIL THE NEXT LEVEL DRAWING (REFERENCE 1) REFERENCE 1 IS AN ARRANGEMENT DRAWING TO INSTALL THE PARTS IN THE SHIP AND WILL CONTAIN THE JI FOR THESE JOINTS; INSTALL CONNECTING ROD JOURNAL BEARINGS (PC NO. 47) INTO CONNECTING ROD (PC NO. 41) IAW WITH MANUFACTURER'S INSTRUCTION FOR ASSEMBLY (EB 4222); Functional Description: STEAR DIVE GEAR STARBOARD OPERATING GEAR ASSEMBLY. 3 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.
NSN 3040-01-493-2840 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.