40 mm Long Brass Pan head slotted screw 4mm dia The Copper nut is 10mm long with a Dia of 6mm. Yes at last a 6mm Loveless bolt none of this 1/4" or 5/16" you just need a 6mm Drill bit and you will get the perfect fit. And with the length of the Nut of 10mm if you drill just a bit to deep into the Handle you will still have enough left sticking out to sand down for the Perfect look to you Knife project