Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number K-07-0342MK-B found under Insulation Block Anchor by Ajax Magnethermec Corp. The National Stock Number assigned to this part is 4430011177548, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like K-07-0342MK-B.