<b>MroMax 20Pcs Butt Screw，carbon Steel Screw for Scrapbook Photo Albums Binding and Leather Saddles</b><br> <br> <b>Introduction and Function</b><br> <br> The screw post is a component composed of a screw with a flat head cap (with or without a drive slot) with a mechanical thread and a nut with a flat head cap. It is generally made of aluminum, copper, carbon steel, stainless steel, and other materials. It is used for office stationery, leather goods, apparel, arm belts, etc. It mainly has the functions of combination, connection, fixing, and wear resistance.<br> <br> When the screw post is used in binding booklets, photo albums, etc., first make a hole at a suitable position, the hole is 0.5mm larger than the diameter of the nut rod of the binding bolts. According to the thickness of the booklet, select the screw corresponding to the length of the nut rod, and insert the two ends into the holes to connect and lock.<br> <br> On office products, furniture, DIY handicrafts, and other items. Screw posts are also very common, providing very simple installation, disassembly, assembly, maintenance, etc. Mechanical threads provide strong precision connection and locking force, can be repeated used many times, every time like new.<br> <br> In leather goods, there are shadows of screw posts everywhere, such as belts, harnesses, leather bags, leather boots, etc. Generally, make a hole in the leather goods first, and insert the corresponding type of screw to lock. In general, it is very sturdy, and it is also convenient for disassembly and maintenance.<br> <br> <b>Specification</b><br> Product Name: Butt Screw<br> Brand: MroMax<br> Material:carbon Steel<br> Thread specification (nut/screw):M4,<br> Groove type: cross<br> Length under nut head: 14mm/0.55",<br> Aperture : 5mm/0.20"<br> <br> <b>Package Content</b><br>20Pcs x Butt Screw