Square Head Coach Screw Spike

1.Main technical data:

1.1 Standard Coach Screw

Tensile Strength: 74,000 psi min,

Yield Strength: 57,000 psi min,

Elongation: 18% min,

Reduction in area 35% min,

Hardness: HRB 80~110.

1.2 High Strength Coach Screw

Tensile Strength: 120,000 psi min,

Yield Strength: 92,000 psi min,

Elongation: 14% min,

Reduction in area 35% min,

Hardness: HRC 22~32.

2. Specification: 3/4″, 7/8″, 15/16″, 1″, 1 1/8″, 1 1/2".

3. Material: 35, 45.