Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21544 ITEM 6 found under Switch Push Pull by Oldenburg Group Incorporated. The National Stock Number assigned to this part is 5930011234187, 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 21544 ITEM 6.