1, Hexagonal head type: one is flat brain, the other is concave brain.
2, Surface color categories: according to different needs, the surface has white, military green, colored yellow, corrosion-resistant Dacromet.
3. Flange category: According to the different positions of the flange bolts, the size requirements of the discs are different, and the flat bottom and the teeth are divided, and the teeth have the anti-slip effect.
4. According to the way of connection, there are common and reamed holes. The flange bolts for the reaming holes should match the size of the holes and be used when subjected to lateral forces.
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