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    ASTM A307 Heavy Hex Bolts

    ASTM A307 is the standard specification for carbon steel bolts, studs, and threaded rods of 60000 PSI tensile strength in sizes from ¼ inch to 4 inches in diameter.

    ITEM STANDARD SIZE
    Guard Rail Bolt with Double Recessed Nut
    ASTM 307A
    16 mm (5/8") x 32 mm (1-1/4") - Full Thread, Clipped Head
    16 mm (5/8") x 50 mm (2") - Full Thread, Round Head
    16 mm (5/8") x 100 mm (4") - Full Thread, Round Head
    16 mm (5/8") x 150 mm (6") - Full Thread, Round Head
    16 mm (5/8") x 200 mm (8") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 250 mm (10") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 350 mm (14”) with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 406 mm (16") with 150 mm (6") of Thread, Round Head
    6 mm (5/8") x 450 mm (18") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 600 mm (24") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 650 mm (26") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 813 mm (32") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 850 mm (34") with 150 mm (6") of Thread, Round Head
    16 mm (5/8") x 900 mm (36") with 150 mm (6") of Thread, Round Head