Hexagon weld nuts Material: steel, plain 4000 Hexagon weld nuts M6 Key 11 , thickness 4.8 (NUT.05) 2000 Hexagon weld nuts M10X1.25 Key 17 , thickness. 8.3 (NUT .04) 2000 Hexagon weld nuts M8 Key 14 , thickness. 6.3 (NUT .06) 2000 Hexagon weld nuts M5 Key 13 , thickness. 6 (NUT .04).