Why are the m5 x 100 mm machine screws so different in weight?

When we deliver a certain item, the cost of the courier is generally determined by the weight of the item and the area of arrival. Especially when exporting, the weight of the item is very important. However, why is the weight difference of the m5 x 100 mm machine screws so large?

When all specifications and quantities of m5 x 100 mm machine screws are the same, the weight of the screws is determined by the material only when the materials are different. Different materials, the same size of the screw weight is not the same. The weight of the material is determined by its density. If the weight of 10,000 pieces of stainless steel is 150kg, then the weight of titanium is about 82kg.

But the material of the screws is the same, the quantity is the same, and the size of only one place is different. For example, stainless steel material, the diameter of the rod is not the same, one-rod diameter is 4.1mm-4.4mm, and the other rod diameter is 4.6mm-4.9mm. 10000 pcs, the diameter of the stem is 4.1-4.4 is 132kg, the diameter of the stem is 4.6-4.9 is about 155kg.

Of course, there is also a case where the screw manufacturer uses the wire size of the m5 x 100 mm machine screws to be smaller than the standard one, and when the rolling thread, the thread is deeper, which will also cause a difference in the weight of the screw.

Skype: kalyn qin M: +86 18124507113 Tel: +86 0755-85296744 Email: annie.li@szsst88.com Add: No. 11, Dinghou Road, Dongfang Community, Songgang Street, Baoan District, Shenzhen, Guangdong, China