There are many types of bolts, which are divided into hollow, solid core, half empty center, core pulling, core tapping, etc. the limitation of area also causes the names of many areas, but in the specification and model, it should be clearly marked. The diameter of the head * the thickness of the head * the length of the pipe (excluding the thickness of the head) * roar diameter * deep hole. Generally, the existing specifications for diameter and deep layer can be omitted. If you do not have engineering drawings or photos, it should include this factor. Then, the raw materials can be produced and manufactured immediately.

Hollow bolts are generally used in the fields of clothing, shoes, etc. the solid core must be riveted again. It is used to connect heavy products. Aluminum iron open core rivets are often constructed without dismantling. Half empty central bolts are more common. The bunches (smaller cable diameter and tail end) are manufactured by hard cables. They can pass through thick steel plates within 0.5mm thickness without pre holes. Bolts can not be bent The change is widely used on the upper side of luggage, trunk and military luggage case and leather goods, while hollow nails (half empty center bolts) are made of copper wire. Single drum rivets generally stipulate that they cannot be split after riveting. There are various types. At present, the shaft on the top of some small toys has just begun to be replaced by half empty center nail or letter nail, which can greatly reduce the product cost 。 The core pulling and core striking bolts are mostly used for riveting thin and soft raw materials. Generally, the regulations are not strict. The materials used for production and manufacture are generally made of raw materials with good plastic deformation.