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05:31 Screws Screws	Screws An explanation of the fixings known as screws. screw screws fixings pan head counter sunk threads shank point screwing drive head friction fitting pilot hole clearance hole drill bit material clearance types pilot thread millimetre friction piece root hole drill pieces bit reason lot From Chris Lord 2 plays 0

05:31

Screws

An explanation of the fixings known as screws.

From Chris Lord 2 plays 0