Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K4M158D found under Housing Bearing Pum by Ram Centrifugal Products Inc. The National Stock Number assigned to this part is 4320010453588, and the Federal Supply Class is 4320 Power And Hand Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like K4M158D.