The Cropped Head Bolts and Nuts slot and twist into aluminium glazing bars, providing a fixing without dismantling your greenhouse. Supplied in packs of 10.
Much better than original full head bolts as can easily be slid into support bars and when you tighten the nut the bolt is designed to turn 90% and then lock in place. I now have extra shelving and everything is secure.
Great to use for attaching anything that needs a bolt in the channel. However, is does not lock into position, so is fiddly to tighten....need a little patience with them.