What is this type of screw called? What specification wrenches are required?

2014-12-31View Original

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What is this type of screw called? What specification wrenches are required?

Reply #22014-12-31

This post was last edited by ylb913 on 2014-12-31 at 18:56. For a dented dodecahedron, an adjustable hook-type should work fine. Also, plum blossom wrenches are usually twelve-sided; I’m not sure if there is a size that fits.

Reply #32014-12-31

This type of bolt is a \"12-angle head flanged bolt\"; you can check the standard:

Reply #42015-01-02

OP, where are these bolts used? I saw it for the first time.

Reply #52015-01-02

It’s the first time I’ve seen this type of 12-point head bolt

Reply #62015-01-02

You’re taking this off track~ My avatar shows steel structures at sea – jacket foundations being placed in the water. Do you know where the screws used in that image are applied?

Reply #72015-01-03

It seems to be used for the fastening bolts of the pump body and volute, based on the picture.

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