Shop.1 › Drill & Tap for Aux Pump Kit Image 1 of 1 Drill & Tap for Aux Pump Kit $65.00 This is the 37/64" drill bit and 3/8-18 NPTF tap required for installation of the auxiliary fuel pump kits. Get notified by email when this product is in stock. Add To Cart Added! This is the 37/64" drill bit and 3/8-18 NPTF tap required for installation of the auxiliary fuel pump kits.