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A carriage bolt, also known as a coach bolt, features a domed or countersunk head, plus 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 300 baja tahan karat.Serrated grates