Extension springs with German and English extended or turning hook

Mollificio Costanzino produces and sells extension springs with German and English extended or turning hook, by design or sample procured by the client, in little lots too.

The extension springs produced by the company have a diameter between 0,20 mm and 6,00 mm.

The materials used:

- Carbon steel wire class SM, SH, DH and according to norm EN 10270-2, also in pre-galvanized and bezinal version.
- Oil tempered and alloy steel wire FD/VD/TD-Cr Si according to norm EN 10270/2.
- Hard stainless steel wire 1.4310, 104401, 1.4568, according to norm EN 10270-3.
- Phosphor bronze wire, copper wire, etc, on demand of the client.