Feature

●High-Strength Material: The concave end tightening set is made of 12.9 grade high-strength alloy steel, which is a high-quality and durable material that has many advantages. 12.9 grade alloy steel has a high hardness and toughness. It is also forged with high-strength materials, can withstand high pressure and torque, and resist wear and tear
●High Temperature Treatment: The set has undergone a high temperature treatment, which improves the screw strength and performance. The high temperature treatment also enhances the corrosions resistance and oxidation resistance of the screws, and prevents them from rusting and fading
●Even Thread: The concave screw 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 silky, 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
●Pratical Quantity: The set has complete specifications and pratical quantity, which can meet your use and replacement needs, and save your time and money. The concave end tightening set includes different sizes and lengths of bolts, which are suitable for most applications and purposes. The concave end tightening set also comes with a plastic box, which is easy to store and carry


Description

Specification:
Item Type: Concave End Tightening SetMaterial: 12.9 grade high-strength alloy steel
Model and Quantity:50 x M3 x 3 Concave End Tightening
50 x M3 x 4 Concave End Tightening
50 x M3 x 10 Concave End Tightening
40 x M4 x 4 Concave End Tightening
40 x M4 x 6 Concave End Tightening
30 x M5 x 5 Concave End Tightening
30 x M5 x 8 Concave End Tightening
20 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:
50 x M3 x 3 Concave End Tightening50 x M3 x 4 Concave End Tightening50 x M3 x 10 Concave End Tightening40 x M4 x 4 Concave End Tightening40 x M4 x 6 Concave End Tightening30 x M5 x 5 Concave End Tightening30 x M5 x 8 Concave End Tightening20 x M6 x 6 Concave End Tightening20 x M6 x 10 Concave End Tightening20 x M8 x 8 Concave End Tightening