This stainless steel mount bolts to the left or right side of the spare tire bump stop on pre-1997 Jeeps that have the bump stop option. Stainless steel mounting hardware is included. Mounting requires you to drill four 1/4"(7mm)holes in the side of the bump stop bracket. To achieve adequate roof clearance and realize sufficient RF radiation with minimal reflection, especially on vehicles with either a hard or soft top, the minimum antenna length used on bump stop installations should be 4' (1.2m).
The mount comes complete with our heavy-duty SO-239 antenna stud. The actual mounting surface is approximately 1 5/8" (43mm) square. Outward protrusion is about 2 1/2" (64mm). The mounting hole pattern, center to center, is based upon a 1" (25mm) square. Base material thickness is 0.100" (2.5mm).