Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3 1-2 101FMS7-16-20LBM30X200RB found under Gage Compound Pressure Vacuum Di by Desco Corp. The National Stock Number assigned to this part is 6685000542537, 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 3 1-2 101FMS7-16-20LBM30X200RB.