Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20-192 found under Ring Proving by Morehouse Instrument Company. The National Stock Number assigned to this part is 5280014209057, and the Federal Supply Class is 5280 Sets Kits And Outfits Of Measuring Tools. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20-192.