The Shaft,upper, cataloged under National Stock Number 3040-01-547-1981, 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 2 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-01-547-1981 |
| Primary Part Number | 7384910 PN 51L1 |
| Item Name | Shaft,upper |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 7384910 PN 51L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| G525-4401 PN 51L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| G547-0001-G5254401-051L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| G5254401-051L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7550477-G5254401-051L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| G547-0001-G5254401-051 | 5/1 Secondary reference U.S. Government activity |
| G5254401-051 | 5/1 Secondary reference U.S. Government activity |
| 7550477-G5254401-051 | 3/1 Design control — primary reference Naval Sea Systems Command |
| 7384910 PN 51 | 5/1 Secondary reference Naval Sea Systems Command |
| G525-4401 PN 51 | 5/1 Secondary reference U.S. Government activity |
NSN 3040-01-547-1981 is a Shaft,upper, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-01-547-1981 has 5 manufacturer part numbers on file: 7384910 PN 51L1 (Naval Inventory Control Point Mechanicsburg), G525-4401 PN 51L1 (Naval Inventory Control Point Mechanicsburg), G547-0001-G5254401-051L1 (Naval Inventory Control Point Mechanicsburg), G5254401-051L1 (Naval Inventory Control Point Mechanicsburg), 7550477-G5254401-051L1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 7384910 PN 51L1: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: SHAFT UPPER; Reference Number Differentiating Characteristics: QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS. 2 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 3040-01-547-1981 has DEMIL Code B. 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.