Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 56-20075 ITEM 4 found under Cap Pillow Block by Moog Inc. The National Stock Number assigned to this part is 3130011884708, and the Federal Supply Class is 3130 Bearings Mounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 56-20075 ITEM 4.