Photos: All courtesy of Honestly...WTF
3 strands of twine cut into one-yard pieces
18 small brass hex nuts
Gather the 3 strands of twine and tie a knot at the top, leaving about 2 inches of slack. Start braiding. At about an inch of the way down, you'll begin braiding in the nuts. Before you braid the far-left strand over the middle strand, thread on a nut, push it against the base of the braid, and cross over. Depending on the thickness of the twine, you can wrap tape around the bottom tips to prevent the twine from fraying.
Keep your thumb at the base of the braid, holding the nut in its place. Before you braid the far-right strand over the middle, thread on another nut, push it against the base of the braid, and cross over. Again, hold your thumb tightly against the base of the braid, keeping the nuts in place. Thread another nut onto the far-left piece and cross over.
Repeat the steps by threading the rest of the nuts to the outer pieces of twine before they are crossed over. Thread, cross, thread, cross. Finish the bracelet with another inch of braided twine and a knot. The bracelet should wrap around your wrist at least two or three times. Trim it to your liking.