Forgefix pronged t nuts are a simple and effective product offering bolting capability into various soft substrates they are zinc plated for increased resistance to corrosion applicationused widely in the soft furnishing trades where strong timber connection is required also extensively used in playground and climbing wall manufacturing guideuse 6mm bolt with m6 and 8mm bolt with m8 t nuts when installing the t nut tap home and the sharp fins pierce the substrate and fix the t nut firmly in plac