For Two-piece, pancake-style zinc anode for rudders and trim tabs.
Diameter: 6-1/2″
Thickness of One Half: 7/8″
Screw: Stainless Steel Socket Cap, 5/16″-18 Threads, 2-1/2″ Length.
EMP Zinc anodes conform to Mil-Spec: MIL-A-18001K

also crosses with:
Canada Metals CMR07
Performance Metals R6500Z
GLM 26656
Technoseal R7
Camp R-07
Reliance MDR-7