Countersunk rivet nuts 1 Countersunk head M5 Sheet Thickness 3mm ~ 3.6mm Open end Length:16mm Qty: 1700 Material: SS Ref. Part No / Drg AESSM5K3.6 2 Countersunk head M5 Sheet Thickness 3mm ~ 3.6mm Closed end Length: 22mm Qty: 400 Material: SS Ref. Part No / Drg AESSM5KB3.6 3 Countersunk head M5 Sheet Thickness 5mm ~ 5.1mm Closed end Length: 23.5mm Qty: 750 Material: SS Ref. Part No / Drg AESSM5KB5.1 4 Countersunk head M6 Sheet Thickness 5mm ~ 5.6mm Closed end Length:26.5mm Qty: 50 Material: SS Ref. Part No / Drg AESSM6KB5.6