TC75014 Fifth Wheel Plate Pin and Bushing Rebuild Repair Kit for Jost JSK37 Series Standard JSK37U Low Lube JSK37UW. Compatible Fifth Wheels: Jost JSK37U, JSK37H, JSK37F, JSK37UA, JSK37US, JSK37UW, JSK37010 for standard, low lube fifth wheel plates. 4 x Hex Bolt (1/2-13 x 3/4 lg).