The expansion bolt grade is divided into: 45, 50, 60, 70, 80.

The material of expansion screws: mainly divided into austenite A1, A2, and A4.

Martensite and ferrite C1, C2, C4.

Steel No. 45, for important or special purpose threaded joints, can be selected from 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMnSi, and other high-mechanical-property alloy steels.

Select different expansion screws according to the actual situation of the wall. Generally, there are several types: 6×60, 6×80, 6×120, and 6×150.

6×60: total length 60 mm, casing length 45 mm, diameter 8 mm, wall thickness 0.7 mm, surface is galvanized with color zinc; screw length 60 mm, diameter 6 mm, thread part 35 mm, cone-shaped bottom rod hammer 8mm, surface is galvanized with color zinc; nut outer diameter 10 mm octagonal, thickness 5 mm, surface is galvanized with white zinc; gasket outer diameter 13 mm, thickness 1mm, inner diameter 6 mm, surface galvanized with white zinc; spring piece is an outer diameter 9 mm, inner diameter 6 mm, thickness 1.6 mm ring.

6×80: Total length 80 mm, casing length 65 mm, diameter 8mm, wall thickness 0.7 mm, surface is galvanized; screw length, nut, gasket, spring plate are the same.

6×120: Total length 120mm, casing length 105mm, diameter 8mm, wall thickness 0.7mm, surface is galvanized; screw length, nut, gasket, spring plate are the same.

6×150: Total length 150mm, casing length 135mm, diameter 8mm, wall thickness 0.7mm, surface is galvanized; screw length, nut, gasket, spring plate are the same.

Expansion bolt grades: 45, 50, 60, 70, 80.

Expansion screw material: main austenite A1, A2, A4,

Martensite and ferrite C1, C2, C4

45 steel, for important or special purpose threaded connections, can choose 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMoSi and other alloy steels with higher mechanical properties.

Please select different expansion screws according to the actual situation of the wall. Generally, there are the following kinds of 6×60, 6×80, 6×120, 6×150.

6×60 the total length is 60 mm the casing length is 45 mm the diameter is 8 mm the wall thickness is 0.7 mm the surface is coated with colored zinc Screw length 60 mm diameter 6 mm thread part 35 mm the bottom rod hammer 8mm conical the surface is painted zinc plating The nut is octagonal with an outer diameter of 10 mm and a thickness of 5 mmThe surface is white zinc plated. Gasket outer diameter 13 mm, thickness 1mm, inner diameter 6 mm, surface coated with white zinc. The shrapnel is a ring with an outer diameter of 9 mm, an inner diameter of 6 mm, and a thickness of 16 mm.

6×80: the total length is 80 mm, the casing length is 65 mm, the diameter is 8mm, the wall thickness is 0.7 mm, the surface is coated with colored zinc; Screw length, nut, gasket, shrapnel as above.

6×120: the total length is 120mm, the casing length is 105mm, the diameter is 8mm, the wall thickness is 0.7mm, and the surface is coated with colored zinc; Screw length, nut, gasket, shrapnel as above.

6×150: the total length is 150mm, the casing length is 135mm, the diameter is 8mm, the wall thickness is 0.7mm, the surface is coated with colored zinc; Screw length, nut, gasket, shrapnel as above.