These handy and inexpensive nut-serts are designed to be hammered into the underside of your spoilboard and and provide a great way of holding your work pieces down to your spoilboard.
 
They are made of zinc coated carbon steel and have 4 easy hammer prongs for securing to the underside of your bed. 
 
This listing is for 20 nut-serts. If you require 100, you can place an order for 5 units from this listing.
 
These nuts accept a 6mm metric threaded bolt and they have a height of 9mm from base to top.
The base flange size is 17.5mm.
 
It is recommended to use a minimum spoilboard thickness of 16mm to use these nuts effectively as you will need some room at the top of the spoilboard to surface your bed.
 
All measurements are +/- 0.5mm.