GYS HR1S Guide De L'utilisateur page 16

After punching the punch is pushed into the metal sheet
and pierces the hole. The sheet is free from the punch
and ready for riveting.
INSTALLATION OF FLOW FORM RIVETS
Once the starter hole is done, insert the Flow-Form rivet:
16
GYSPRESS 8T PUSH PULL
Before assembling metal sheets with Flow-Form rivets, it is necessary to pre-drill the metal (see
the procedure above).
The end piece F1 must be on the head rivet side:
EN