... , T-bolt, T head bolts, hammer head bolts thread bolt, T-bolt, T head bolts, hammer head bolts 1. Standard of T head ... Inch size from Grade2 to Grade10.4. Size of T head Bolts: diameter from M6to M20 or 1/4 ... be from 10mm to 500mm.5. Surafce Finish of T head Bolts: plain, black, zinc plated, H.D ... etc.6. Produce according to drawing or samples 7.Packing of T head Bolts:Inner packing: 25kg/carton, 30*20 ...