BR 4,0-Mandrino corto 1a maggior. d.2,92 (giallo) x foro d.4,1

Short mandrels for BR rivets.
For aluminium and steel.
With standard heads you have to use short mandrels, with long heads you have to use long mandrels.
When you use curved heads, you have to bend the mandrels manually in order to ensure a perfect loading of the rivets.
Mandrels are to be chosen according to the rivet type and size, and according to the hole diameter where the rivet has to be fixed. If you use a wrong mandrel, you could cause breakages and wear and tear of the mandrel head.
Mandrels are subject t wear and tear. To avoid breakage, you have to change the mandrel after fastening about 30.000 rivets.