Round head bolts with square neck M10X25 8.8 Pitch - 1.5 Sq Neck width across flats - max - 10.58 Sq Neck height - max - 4 Round head dia. - max.- 22.3 Round head height - max.- 5.8 QTY - 1000 Thread Length: ISO 888 Material: Class 8.8 ISO 898-1 Finish: Zinc Dichromate Yellow (ZND) per STPA020 and MAT0310 Head dimensions: ISO 8678