Screw for plastic with canted shaft, what is it called?
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  1. #1
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    Default Screw for plastic with canted shaft, what is it called?

    I am trying to replace some rusted out security screws that are designed to go into a plastic housing. The screws are about 12 TPI #10, but the shaft is canted. The profile of the screw looks something like this:

    security_screw.jpg

    Any idea what this type of screw is called? I think they are oem'ed by Bosch because the sensor in the housing is made by them.

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    take a look here and see if you find what you are looking for.

    screws for thermoplastics - Google Search

    Tom

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    Some additional research revealed that the screw is called a "Delta PT" screw.

    Nothing worse than these obscure fasteners that are impractical to duplicate locally.

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    google "Plastite" you will find what you are looking for. McMaster has them also.

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    Quote Originally Posted by jscpm View Post
    Some additional research revealed that the screw is called a "Delta PT" screw.

    Nothing worse than these obscure fasteners that are impractical to duplicate locally.
    Its not because fastener engineers dreamed of an obscure thread to make life miserable for people like yourself. Plastics, both thermoplastic and thermoset, have different needs than machine screws. Threads have been developed to address these needs, mainly retention and minimizing local stresses. Normally, these screws are driven into unthreaded holes.

    Tom


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