The Fabco 688-0727 (also referenced as 6880727) is a 1-1/4-12 hex self locking nut designed for heavy-duty truck applications. Sourced as a genuine Fabco OEM part, it carries a 1-1/4 inch nominal thread diameter with a 12 threads-per-inch pitch and a hex configuration with a self-locking design to resist loosening under vibration and load. Fabco components are used across transfer cases, PTOs, and steerable drive axles on severe-duty platforms. If you need help confirming this is the correct nut for your application, call us at Pro Gear and Transmission.
Features
Genuine Fabco OEM part number 688-0727 or 6880727
1-1/4 inch nominal thread diameter, 12 threads per inch pitch
Hex configuration with self-locking design resists loosening under vibration
Suited for transfer case, PTO, and steerable drive axle assemblies
Available from Pro Gear and Transmission
Tech Specs
- Thread Size: 1-1/4-12 (1-1/4 in. diameter, 12 threads per inch)
- Thread Type: Hex Self Locking
- Part Number: 688-0727 or 6880727
- Brand: Fabco (Genuine OEM)
