Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 16123 found under Hose Rubber by Grove R B Inc. The National Stock Number assigned to this part is 4720011222964, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 16123.