Fabco Nut 688-0342 is a 1/2-20 UNJF-3B high tensile hex nut, also listed as part number 6880342. The 1/2-20 thread is a 1/2 inch diameter fine thread with 20 threads per inch, cut to the UNJF-3B specification for a controlled root radius and a close, class 3 fit. As a high tensile hex nut, it is built to hold torque on fastener joints found in Fabco transfer cases, power takeoff units, and steerable drive axle assemblies. It threads onto a matching 1/2-20 UNJF bolt or stud. This is a genuine Fabco part sold by Pro Gear and Transmission. Not sure this is your part? Give us a call to confirm proper fit for your application.
Features
Fabco part number 688-0342, also written 6880342
1/2-20 thread: 1/2 inch diameter, 20 threads per inch (fine)
UNJF-3B thread form with class 3B close fit
High tensile hex nut for high torque joints
Used on Fabco transfer case, PTO, and steerable drive axle assemblies
Genuine Fabco OEM fastener
Tech Specs
- Part number: 688-0342 or 6880342
- Thread size: 1/2-20 (1/2 inch diameter, 20 TPI fine)
- Thread form: UNJF-3B, class 3B fit
- Type: High tensile hex nut
- Brand: Fabco
