Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MB300-381 found under Shaft Straight by Martin Baker America Inc. The National Stock Number assigned to this part is 3040000092441, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MB300-381.