The Shaft,straight, cataloged under National Stock Number 3040-01-485-7656, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-485-7656 |
| Primary Part Number | 721-7286699-30 |
| Item Name | Shaft,straight |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES |
| First End Diameter | 0.8690 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN |
| Second End Diameter | 0.8690 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN |
| First End Style | FLAT KEYWAYS AND INTERNALLY THREADED |
| Second End Keyway Width | 0.1880 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM IN |
| First End Internal Thread Length | 0.750 INCHES NOMINAL IN |
| Material Document and Classification | ASTM A564 TY 630, COND H1100, AGE HARDENING ASSN STD SINGLE MATERIAL RESPONSE |
| First End Keyway Depth | 0.109 INCHES NOMINAL IN |
| Second End Keyway Depth | 0.109 INCHES NOMINAL IN |
| End Similarity | NOT IDENTICAL |
| Second End Style | FLAT KEYWAYS AND INTERNALLY THREADED |
| Material | STEEL CORROSION RESISTING |
| Second End Internal Thread Length | 0.750 INCHES NOMINAL IN |
| External Keyway Length | 1.130 INCHES MINIMUM AND 1.160 INCHES MAXIMUM FIRST END IN |
| External Keyway Length | 1.510 INCHES MINIMUM AND 1.530 INCHES MAXIMUM SECOND END IN |
| First End Keyway Width | 0.1880 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM 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 |
|---|---|
| 721-7286699-30 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 7286699 | D/9 Drawing number reference only Naval Sea Systems Command |
| H861-1506-30 | 5/2 Secondary reference U.S. Government activity |
| H861-1506 | D/9 Drawing number reference only U.S. Government activity |
NSN 3040-01-485-7656 is a Shaft,straight, manufactured by Naval Sea Systems Command, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-485-7656 has 1 manufacturer part number on file: 721-7286699-30 (Naval Sea Systems Command).
Key specifications for 721-7286699-30: Surface Finish: 125.0 MICROINCHES; First End Diameter: 0.8690 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN; Second End Diameter: 0.8690 INCHES MINIMUM AND 0.8700 INCHES MAXIMUM IN; First End Style: FLAT KEYWAYS AND INTERNALLY THREADED. 16 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.