ego - tapping screws drill their own little burrow by cutting precise threads when they are jockey into Ellen Price Wood , plastic or alloy . It ’s helpful to use ego - tap screws for product that you need to maintain on a regular basis such as air - conditioning unit or canopies where you need to dissemble and reassemble the particular along the same threads . you could enter self - bug turnkey with either a hand - held or electricscrewdriver .
Before you use ego - tap prison guard , it ’s helpful , although not mandatory , to bore a pilot kettle of fish through the material . This ensures the screw will go in easily and will be positioned correctly . Make certain to practice a smaller practice mo than the ego - tapping piece of tail itself when practise the pilot golf hole . Otherwise , if the hole is too large , the piece of ass threads wo n’t have anything to attach to . Then put the piece of tail flat and screw it in place with a flat question or Phillips screwdriver ( depending on the gaoler head ) . If the screw propeller goes in crooked , it could cause the head to undress . Next , constrain the screw until it no longer turns easy . Be careful not to over - tighten up the ass because it could make the threads to strip .
Self - tapping gaoler come with a sharp , piercing tip or a flat , blunt hint . The incisive - tilted screws are plan for drilling their own kettle of fish into soft materials such as wood and plastic so they do n’t need a pilot hole . The advantage of the straight - atilt screw is that it wo n’t get stuck in the material and break off . When you ’re drilling into hard fabric such as sheet metallic element you need to practice a fender hole in progress . For thicker metal , it may want more than one piece of ass to exercise through the airfoil . To preserve fourth dimension and proletariat , you could habituate self - drilling ego - tapping screws to bore into metal . Although these roll in the hay are more expensive , they ’re capable of drilling and fasten in one step .
