Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MK1513-3 found under Valve Release Screw by Star Hydraulics Inc. The National Stock Number assigned to this part is 3110003158726, and the Federal Supply Class is 3110 Bearings Antifriction Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MK1513-3.