Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MC-81-L-1A found under Switch Subassembly by Mcnab Incorporated. The National Stock Number assigned to this part is 5930012865851, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MC-81-L-1A.