75mm Twin-Thread Drywall Screws (zinc)

 Size: 4.2 x 75mm

• Manufactured to JIS B1125 (1995) and independently tested to IFI specification ASTM C1002-89.

• 25ø "Super Sharp" (SS) point for ease of penetration.

• 60ø twin thread.

• Surface hardened up to 750 HV to prevent torque shearing under load and a core hardness of up to 450 HV for improved ductility.

• Made from C10-18 Steel.

• Cosmetically plated in zinc.

• Full batch-traceability to the original steel mill certificate.

• Designed to pierce and drill into 0.9 mm of metal channel. For larger gauge channel self-drilling drywall screws are recommended.

500 PER BOX