Jim/Alexandria VA (ALumijim) supplied the following:
Our boats use 5086 plate. Try
www.mcmaster.com. Their Part Number: 5865T42 is a plate of 5086 3/16" thick and 12" X 24".
The following is today's current pricing (June 3, 2009) from McMaster/Carr:
Part Number: 5865T42 $27.79 Each. Material: Super-Corrosion-Resistant Aluminum (Alloy 5086)
Finish/Coating: Unpolished (Mill)
Edge Type: Square
Tolerance: Standard
Thickness: .19"
Thickness Tolerance: ±.009"
Length: 24"
Length Tolerance: ±.1/16"
Width: 12"
Joel Albert, Potomac MD
"Charlie B" - 1988 32' FBS
Twin 318's/FWC/16x15 nibral props
docked Deale, MD