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Home> Specification for expansion screws

Specification for expansion screws

Four: four house lizard aka expansion screws. Expansion bolt is divided into: 50, 45, 60, 70, 80, expansion screws of the material: mainly divided into austenite A2, A1, A

Four: four house lizard aka expansion screwsThe expansion bolt is divided into 45 grades: 50, 60, 70,, 80, expansion screws of the material: mainly divided into austenite A2, A1, A4Martensite and ferrite C1, C2, C4,
Its representation method is A2-70,
"-" respectively, before and after the bolt material and strength grade, the following is the complete expansion bolt specification table.

(1) the bolt material commonly used materials: Q215, Q235, 25 and 45 steel, for the important or special purpose of threaded connections, can choose 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMrSi and other mechanical properties of high alloy steel.
(2) the allowable stress and load characteristics (static and variable load) and the connection of the allowable stress screw threads are not tight, whether the pre tightening force needs to be controlled and the material, structure size and other factors.
According to the actual situation of the wall selection of different expansion screws. Generally have the following several 6*80, 6*60, 6*120, 6*150.
6*60: length of 60 mm casing length 45 mm, 8 mm in diameter and wall thickness of 0.7 mm, the surface is color zinc plating; screw length 60 mm, diameter 6 mm, 35 mm, the bottom part of the screw rod hammer 8mm conical surface is zincplatingcolor; octagon, the thickness of the outer diameter of the nut 10 mm 5 mm, the surface is white zinc plated gasket; a diameter of 13 mm, thickness 1mm, diameter 6 mm, white zinc plated surface; the elastic plate is a diameter of 9 mm, 6 mm inner diameter and thickness of 1.6 mm ring.
6*80: length of 80 mm casing length 65 mm, 8 mm in diameter and wall thickness of 0.7 mm, the surface is color zinc plating; screw, nut, washer, spring.
6*120: length 120mm, casing length 105mm, diameter of 8 mm and 0.7 mm in wall thickness, the surface is color zinc plating; screw, nut, washer, spring.
6*150: length 150mm, casing length 135mm, diameter of 8 mm and 0.7 mm in wall thickness, the surface is color zinc plating; screw, nut, washer, spring.