The mounting stem is 7/16" diameter x 3/8" long

Replacement for popular pane lmounted breakersused everywhere in the industry

Use this with any standard radio that has a built in hailer 20watts or less in power

delivering up to 23 lbs

10-point light arc

Marine Hardware - Low-Volume Thru-Hulls, Part No. THMR-1.000-B-HSWP Back Box The mounting stem is 7/16"these bronze thru hull water pick ups are for low volume pumps like baitwell they have straight pipe threads on the neck and tapered threads at the end to mate with other fittings. They Include a flange jam nut and two No. 8 flathead screws in the flange to hold the "scoop" in the correct position. Size Flange O. D. Neck Length 1" 2 1 4" 2 1 2"