UNI 5739 Hexagon head screws: M27 X 90 ASTM A490M TYPE1 GEOMET 321 GR.B + PLUS VLh, 37 pcs. M30 X 110 ASTM A490M TYPE1 GEOMET 321 GR.B + PLUS VLh, 53 pcs. M39 X 180 ASTM A490M TYPE1 GEOMET 321 GR.B + PLUS VLh, 260 pcs.