# NSN 4920-01-518-4064: Main Gearbox Tool S

NSN 4920-01-518-4064 (also written 4920015184064; NIIN 01-518-4064) is a main gearbox tool s in Federal Supply Class 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. 3 manufacturer part numbers from 3 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 4920-01-518-4064 (4920015184064)
- NIIN: 01-518-4064 (015184064)
- Item name: MAIN GEARBOX TOOL S
- Federal Supply Class: [FSC 4920 Aircraft Maintenance and Repair Shop Specialized Equipment](https://nsnexplorer.com/fsc/4920/)
- Federal Supply Group: [FSG 49](https://nsnexplorer.com/group/49/)
- Acquisition method suffix code: AMSC Q: the government lacks adequate data or rights, but breakout to competition is expected. (observed 2026-10-10)
- Acquisition method code: 1

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| ABHP | OVERALL LENGTH | INCHES NOMINAL 22.000 |
| ABKW | OVERALL HEIGHT | INCHES NOMINAL 14.000 |
| ABMK | OVERALL WIDTH | INCHES NOMINAL 20.000 |
| AKYD | ACCESSORY COMPONENTS AND QUANTITY | SPINDLE PULLER 1; PILLOW BLOCK JACK-SCREW 1; GO GAUGE 1; NO-GO GAUGE 1; GO-NO-GO GAUGE 1; HANDLE 1; EXPANSION PINS 2; BOLT 1 |
| FEAT | SPECIAL FEATURES | USED TO ALIGN THE MAIN GEARBOX MOUNTS DURING INSTALLATION OF THE GEARBOX, AND ALIGN THE MOUNT BOLT HOLES DURING PILLOW BLOCK INSTALLATION |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 449-240-025-101 | 1P6K0 | FORM FIT & FUNCTION LLC DIV F3 | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 449-240-025-101 | 97499 | BELL TEXTRON INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 63GF-100013-101 | 1TY06 | BELL AEROSPACE SERVICES INC. | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4920015184064&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4920015184064
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4920-01-518-4064/
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