400Pcs Concave End Tightening Set High‑Strength Alloy Steel Hardware Parts M3‑M8

1、Made of 12.9 grade alloy steel high‑strength material, and through high temperature treatment, the screw strength is improved.

2、The overall thread of the bolts are neat and clear, not easy to get stuck and glossy, and the force is even.

3、Standard hex grooves, not easy to slip, speed up work efficiency, complete specifications.

4、Small size, easy to carry and store, convenient to use and with good performance.

5、A large number, can meet your use and replacement needs, very practically.Item Type: Concave End Tightening Set

Material: 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 Tightening60 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