Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BL-3861 found under Roller Winch Assy by Bell Boeing Joint Project Office. The National Stock Number assigned to this part is 1680000127380, and the Federal Supply Class is 1680 Miscellaneous Aircraft Accessories And Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BL-3861.