Self-tapping screws Introduction

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Self-tapping screws, English, called Self-tapping Screw is self-tapping drilled in the pre-drilled holes in the metal or non-metallic materials with the female thread of a threaded fastener. With a high-tension, one-piece, unilater al combination of characteristics. Its own molding or attack its mating threads, in combination with high locking capabilities and handling. Small shaped screws on its size, thread type, head type drilling tapping performance engineering uses almost limitless. constant power loadsTapping nail materials can be divided into two kinds of carbon steel and stainless steel, carbon steel material is usually dominated by 1022 carbon steel. Usually used in windows and doors, iron. Its head is at one end made to increase the bearing surface formed by the shape of the part. hydraulic hose assembliesThread forming and thread cutting tapping screw (self-tapping screw) in terms of flat countersunk, oval countersunk (Oval Countersunk), pan head (Pan ), hexagonal and hexagonal wire head (Hex and Hex washer Head) is the most important five head type accounted for al most 90 percent of all self-tapping screws, self-tapping screws (self-tapping screw) should consider this.conduit saddle Another five kinds of other types of flat-topped concave bearing surface (Flat Undercut), flat-topped whole edge (Flat Trim), the oblate concave bearing surface (Oval Undercut) oblate entire edge (Oval Trim) and cylinder head (Gang hills Fillister ) is a relatively minor head type, while Hong top countersunk thread rolling into self-tapping screws (self-tapping screw) the first type of choice on the same,hydraulic fitting use the main consideration mushroom head (Truss) Round (Round) and 100 degrees flat top countersink the new design does not take cover its function can be replaced by other head type, disk head can be replaced by a mushroom head and round head, 82 degree flat countersunk flat-topped replace the 100-degree flat, flat dome, pan head hex head hex washer head five.