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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
04:15 Nuts & Bolts Nuts & Bolts	Nuts & Bolts A brief introduction to nuts, bolts and washers. nut bolt washer wing fixing grove stores stores art shop screwdriver spanner friction fitting locking thread head size length diameter From Chris Lord 7 plays 0