Schrtoth SG39 reinforcement plates, also called back-up plates by many chassis builders, are used when reinforcing a harness mount point when the location has not been engineered by the auto manufacturer. Any time you mount a harness to sheet metal, you will need to put a reinforcement plate under it to keep it from ripping out of the floor.
Schroth Racing SG39 Reinforcement Plate Details:
Schroth 7/16″ x 20TPI Reinforcement Back-Up Plates make for a perfect harness install. This Schroth back-up plate measures 3.25″ long x 2″ wide with a 7/16 x 20 TPI nut welded to it. This is what comes with most Schroth harness sets to mount your harness eye bolt to.
This back-up plate is what comes standard issue with most Schroth Racing Harness kits
