Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FS30-188 found under Weight Counterbalan by Automatic Switch Company. The National Stock Number assigned to this part is 3040014307297, 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 FS30-188.