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5" Quarter-turn deck plate w/ internal collar (1) 8-32 x 3/4" PH (6) 8-32 Nyloc nut (6) #8 Flat Washer (6) This Sea-Lect Designs 4" Quarter-Turn Deck Plate w/ Internal Collar works great with a 5" Deck Plate Bag (K337159R-1) also listed on Amazon.When installing, use silicone sealant on hull or deck surface for a watertight seal. Lubricate with Teflon grease, Vaseline or 303 aerospace protectant and clean with hot, soapy water.Kit Includes: Quarter Turn Deck Plate w/ Internal Collar (1) 8-32 x 3/4" PH (6) 8-32 Nyloc nut (6) #8 Flat Washer (6)5" Deck Plate = A: 5-1/2" / B: 6-3/4" / C: 5-3/8" / D: 6-1/8"Deck Plate made in the USA (Everett, WA)!