For Tri-Wing safety screws
High chrome-vanadium steel, fully hardened, with high elasticity.
DIN 3126, ISO 1173, form C 6.3.
Torsion zone of protection against the early breakage of the tip under load.
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For Tri-Wing safety screws
High chrome-vanadium steel, fully hardened, with high elasticity.
DIN 3126, ISO 1173, form C 6.3.
Torsion zone of protection against the early breakage of the tip under load.
