A carriage bolt, generally known as a mentor bolt, has a domed or countersunk head, and also the shank is topped by a …Diproduksi oleh perakitan serangkaian batang logam sama spasi untuk menghubungkan anggota lintas, Grating AIS  tersedia dalam tiga bahan populer; baja karbon ringan, 6000 aluminium seri, dan seri three hundred baja tahan karat.J… Read More