THE 2-MINUTE RULE FOR WHAT IS A LEAD SCREW

Also known as pig nose or twin gap, this screw head has two round holes that happen to be opposite each other and resemble a pig’s nose. It's really a safety-design and style screw to stop tampering. You may need a Specific spanner screwdriver for this type of screw head.Generally may be regarded by their blue hue. They’re screwed into pilot ho