PZTR5A-15 Laser Platinum Spark Plug | NGK 7862 Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics. NGK spark plug PZTR5A-15 Stock number 7862 14mm thread size 18mm thread length Resistor Tapered seat Platinum Gap 0.059 in. or 1.5mm 5/8 in. or 16mm hex Replaces AC Delco 41-983, 41-993 Replaces Crusader RP030009, RP030011 Replaces Mercruiser 33-863622001 Replaces Marine Power 810E-210 Replaces NGK TR55IX Replaces PCM RP030009, RP030011 Replaces Volvo Penta 3861326, 3861327