Schmitt & Ongaro Marine Center Nut f/710 711 712 720 724 730 Models 5/8". This Boating and Marine from Schmitt & Ongaro Marine is made using incredibly strong materials and construction to provide you with a product that will last you an extremely long time. For a great way to make sure you are working with one of the better nuts the marine industry has to offer choose the Schmitt & Ongaro Marine 5/8" Center Nut f/710 711 712 720 724 730 Models. Specifications for Schmitt & Ongaro Marine 5/8" Center Nut f/710 711 712 720 724 730 Models: Manufacturer: Schmitt & Ongaro Marine Color: Black Package Contents: Schmitt & Ongaro Marine 5/8" Center Nut f/710 711 712 720 724 730 Models Schmitt & Ongaro Marine 758NUT: Center Nut f/710 711 712 720 724 730 Models 5/8"