Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3B1277B1 found under Cylinder Assembly H by Standard Mfg Co Inc. The National Stock Number assigned to this part is 2530007843423, and the Federal Supply Class is 2530 Vehicular Brake Steering Axle Wheel And Track Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3B1277B1.