Feature

●High Strength Material: The concave end tightening set is made of 12.9 grade alloy steel high-strength materials. 12.9 grade alloy steel has a high hardness and toughnes. That also has undergone a high temperature treatment, which improves the screw strength and performance. It also enhances the corrosions resistance and oxidation resistance of the screws, and prevents them from rusting and fading
●Even Thread: The set has a clear and even thread, which is the result of fine machining and processing. The thread of the bolts is neat and clear, and it can fit into the holes perfectly and prevent stripping or damage. The thread of the bolts is also not easy to get stuck and glossy, and it has an even force
●Standard Hex Head: The tightening set has a standard and not easy to slip hex head, which is convenient and efficient to use. The head of the bolts is a standard hex groove, which can match with most wrenches and drivers. The head of the bolts is also not easy to slip during rotation
●Easy to Use: The set has a small size, which is easy to carry and store. The concave end tightening set comes with a plastic box, which can protect the screws from dust and moisture. It is also easy to use, as you just need to drill a hole, insert the bolt, and tighten the nut
●Pratical: The end tightening set has a large number, which can meet your use and replacement needs. It includes different sizes and lengths of bolts, which are suitable for most applications and purposes. The set also has a pratical quantity, which is enough for long term use and multiple purposes


Description

Specification:
Item Type: Concave End Tightening SetMaterial: 12.9 grade high-strength alloy steel
Model and Quantity:60 x M3 x 3 Concave End Tightening
60 x M3 x 4 Concave End Tightening
50 x M3 x 10 Concave End Tightening
50 x M4 x 4 Concave End Tightening
40 x M4 x 6 Concave End Tightening
40 x M5 x 5 Concave End Tightening
30 x M5 x 8 Concave End Tightening
30 x M6 x 6 Concave End Tightening
20 x M6 x 10 Concave End Tightening
20 x M8 x 8 Concave End Tightening

Package List:60 x M3 x 3 Concave End Tightening60 x M3 x 4 Concave End Tightening50 x M3 x 10 Concave End Tightening50 x M4 x 4 Concave End Tightening40 x M4 x 6 Concave End Tightening40 x M5 x 5 Concave End Tightening30 x M5 x 8 Concave End Tightening30 x M6 x 6 Concave End Tightening20 x M6 x 10 Concave End Tightening20 x M8 x 8 Concave End Tightening