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Your favourite screw head

Arran Cameron

What is your favourite screw head for small machine and self tapping screws? Is it Slotted, Pozidriv, Torx, JIS B 1012, or do you prefer something more exotic like Pentalobe or Tri-Wing?


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    Well both JIS and Pozidrive are attempts to improve on the American  Phillips.

    JIS have retained the same angles of attack  (26.5 degres cone angle) but have the point removed and vertical wings, not tapered so a JIS driver can be used on a Phillips screw and will go all the way in, but a Phillips driver will ride high in a JIS screw and not engage well.
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  • 0
    Well both JIS and Pozidrive are attempts to improve on the American  Phillips.

    JIS have retained the same angles of attack  (26.5 degres cone angle) but have the point removed and vertical wings, not tapered so a JIS driver can be used on a Phillips screw and will go all the way in, but a Phillips driver will ride high in a JIS screw and not engage well.
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