US Cable Ties clamp cable ties are made from impact modified 6/6 nylon. Impact modified nylon 6/6 has been heat stabilized to 285-Degree F, and has a working temperature range of-40 to 185-Degree F (-40 to 85-Degree C). Clamp ties have a contoured head that allows the tie to make full surface contact and act as a clamp. 4-Inch Clamp ties are approximately.09-Inch wide. Tensile strength of 60-Pound.