Home » Tender for Supply Of M.s. Black Hexagon Head Bolts With Threads, Specifically M16 Size And 50 Mm Nominal Length, Along With Hexagon Nuts Of The Same Size. The Bolts Conform To Is 1363 (part 1):2023 And Iso 4016:2022 Standards, While The Nuts Conform To Is 1363 (part, India