Oni Tools Main Shaft Gear Fixing Screw is a direct replacement for Volvo Penta OEM parts 9996917. Heavy duty tool used to disassemble and assemble the mainshaft on the gearbox for Volvo FM FH and Mack trucks I-Shift Transmission AT2512C, AT2412D, AT(O)2612D, AT2812D and ATO3112D. This specialty screw is 32mm in external diameter and 64mm in lenght. Fits on to the main shaft and frequently used with screw 9996483 (NOT INCLUDED) for the countershaft. Manufactured with high quality carbon steel, high strength, anti-wear, rust resistance, anti-oxidation, sturdy and durable. Oni Tools ensures quality automotive products and stands behind top of the line manufacturing. We guarantee our products to last and offer support for our mechanics along the way.