4" Blade Retainer Screw
The 4” Blade Retainer Screw is a flat head screw used to fasten the 4” Blade (TT-HEAD-4BLD) to the 4” Bursting Head (TT-HEAD-4SHELL). It requires a 5/32” (or 4mm) hex key, and should be installed with anti-seize. A shorter screw (TT-FSNR-BA375F) is required to fasten the 4” Blade to the Pre-burster or the Triple Chuck Head.
- 1/4-20 TPI
- 0.5” long
- fastener rating equivalent to or greater than grade 8
- torque to no more than 5 ft-lb