3/8 UNC x 5 1/2 Gr S HT HEX BOLTS S/COL HHONC0370550
3/8 UNC x 6 Gr S HT HEX BOLTS S/COL HHONC0370600
3/8 UNC x 7 Gr S HT HEX BOLTS S/COL HHONC0370700
from Kerridge Commercial Systems Ltd