As an Amazon Associate, we earn from qualifying purchases. OM489B15 Counterbore (Pilot) Omega Technologies . OM489B15 Gallery Attributes Brand name, Manufacturer name, ManufacturerOmega Technologies Extra Product NameOM489B15 Counterbore (Pilot) keywordsAircraft, counterbores, spotfacers, fasteners, pilot moq, multiple, tierMinQty11 MPN, SKUOM489B15 qtyInStock0 snippetAircraft counterbores or spotfacers are used to assure a flat seating surface for fasteners or mating parts that are 90 degree to the axis of the hole. Pilot Diameter: 7/16'' Shank Diameter: 1/8'' tierPrice17.50 Distributor offers SellerSKUMOQIn stockMultiplePrices omegatec.comOM489B15111 @ $7.50