Square through hole with brass reinforcement.
Black, glossy finish.
Special front housing (d<SUB>2</SUB>) for hexagon blind nut with spherical cap UNI 5721-69.<BR>The exclusive five-lobe shape (ELESA original design) offers the operator’s fingers a proper grip and prevents unhealthy residues from depositing thanks to its solid shape without cavities.
Phenolic based (PF) Duroplast. Resistant to solvents, oils, greases and other chemical agents.