Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS5953-2-250 found under Cap Protective Dust by Mcdonnell Douglas Helicopter. The National Stock Number assigned to this part is 5340014405770, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HS5953-2-250.