Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X231-11HK found under Gear Assembly Speed Decreaser by Kaman Industrial Technologies. The National Stock Number assigned to this part is 3010012313722, and the Federal Supply Class is 3010 Torque Converters And Speed Changers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X231-11HK.