Home » Tender for The Tender Involves The Supply Of Various Types Of Heavy-duty Pipes And Bolts. Specifically, It Includes M.s. Bolts With Hex Heads Of Size M12 X 75 Mm, Heavy M.s. Pipes Of Size 25 Mm Nb, And Heavy Quality M.s. Pipes Of Size 40 Mm Nb. M. S. Bolt Hex. Head, India