Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 55THIN-13-VAC found under Pad Floor Polishing by Acs Industries Inc. The National Stock Number assigned to this part is 7910006856657, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 55THIN-13-VAC.