Thread: 3/8" UNF countersunk left hand screw?
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Baron[_4_] Baron[_4_] is offline
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Default 3/8" UNF countersunk left hand screw?
whit3rd Inscribed thus:

If it helps, a 3/8" UNF lefthand screw is also
a common way for a handheld power saw blade
to be attached.

Isn't LH 3/8" UNF the same thread used on hand drill chucks ?

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Best Regards:
Baron.
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