Nuts and bolts

Manufacturing processes

• Hot forging – ø 8 to ø 150

• Cold forging – ø 4 to ø 33

• Machining

• Rolled threading (metric or others, coarse or fine threads)

Raw materials

• Carbon steel or alloy steel

• Stainless steel

• Copper

• Brass

• Aluminium

Heat treatments

• Tempering, quenching

• High frequency treatment

• Case hardening

Mechanical properties

• Bolts: class 4.8 to 12.9

• Nuts: class 6 to 10

• Thread locker

Surface protections

• Shot blasting

• Oiling

• Browning

• Phosphatising

• Electrolytic zinc plating, hydrogen de-embrittlement process

• Zinc flake plating

• Cataphoresis

• Anodizing

• Hot dip galvanizing

• Chromium plating