RAM® Ball Adapter with AMPS Plate for Garmin GPSMAP 620 & 640 RAM-B-231Z-RVMU Rubber ball and socket feature

Rubber ball and socket feature dampens shock and vibration

5" diameter base with 1/2" NPT female thread at a 90 degree angle to the base

60" steel backer plate

though the load capacity decreases with the bolt size

All hardware to connect the rail adapter to the plate is included

RAM® Ball Adapter with AMPS Plate for Garmin GPSMAP 620 & 640 RAM-B-231Z-RVMU Rubber ball and socket featureThe RAM B 347 G4 base consists of a 1" diameter rubber ball connected at right angles to a 2" x 1. 7" square base. The base has four pre drilled holes at each corner, making the universal 1. 5 x 1. 188 (hole spacing) AMPS hole pattern.