B position: B ideas are found in equipment thread screws and so are for steel, plastic and plywood, in which a pilot gap continues to be drilled. They will often be best for shallow holes The hex drive permits using sockets and spanners for tightening and loosening the screw (or bolt). There's a huge Speak to surface area location so big quantitie

presented the abundance of screw types out there, you might go nuts attempting to determine every one and Studying to tell apart it in the relaxation based upon its makes use of and characteristics—it could consider you weeks to determine it out. Hex screw heads are of two types—exterior and inner. External screw heads are hexagonal and protru