Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 810501-173 ITEM NO 39 found under Circuit Card Assembly by Tri Tec Manufacturing Llc. The National Stock Number assigned to this part is 5998016145918, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 810501-173 ITEM NO 39.