Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AF40C25 found under Valve Air Shut Off by Kaiser Fluid Technologies Inc. The National Stock Number assigned to this part is 1660006226237, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AF40C25.