Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HS610SP3740R250X0300 found under Bushing Sleeve by Mcdonnell Douglas Helicopter. The National Stock Number assigned to this part is 3120011725181, and the Federal Supply Class is 3120 Bearings Plain Unmounted. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HS610SP3740R250X0300.