Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number KOH-540A found under Punch Set Knockout Hydraulic by Gb Electrical Inc. The National Stock Number assigned to this part is 5110009610400, and the Federal Supply Class is 5110 Hand Tools Edged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like KOH-540A.