Expansion Bolt

Expansion Bolt

Expansion bolt is manufactured from Q215, Q235, 35#and 45# steel. Also, some alloy steel with good mechanical properties can be selected such as 15Cr, 20 Cr, 40 Cr, 15MnVB, and 30CrMrSi, etc. to produce some special products. In addition, the grade of this product can be divided into 45, 50, 60, 70, and 80. Its raw material mainly is of austenitic grade A1, A2, A4, ferritic grade C1, C2, C4, as well as martensite. We are able to acquire its material and grade from its model e.g. A2-70. A2 means the raw material and 70 stands for its grade. The complete technical table is as follows.

The expansion bolt offered by us consists of countersunk screw, lead sleeve, plain washer, spring cushion, as well as hexagon nut. Construction workers can insert this product into the hole which is drilled in wood or wall ahead of time. When the nut is tightened by a wrench, the hex nut compresses the lead sleeve, resulting in expansion. According to the specification of thread, our product falls into M6, M8, M10, M12, as well as M16, etc. Thanks to its maximum tension resistance of 19020N and maximum shear resistance of 14120N, it is blessed with good fixed effects.

Technical Specifications
Specification M6 M8 M10 M12 M14 M16 M18 M20
Length 50 60 70 80 100 100 150 150
60 70 80 90 125 120 180 180
65 80 90 100 150 125 200 200
80 90 95 110 145 250 250
100 100 100 120 150 300 300
110 110 130 180
120 120 150 200
130 180 250
150 200 300
Technical Specification of Components
Thread Standards Length Nominal Length (L) Dimension of Lead Sleeve Mounting Dimension (a) Hole Size Fixture Allowable Dead Load Stress
(d) (b) Common Specification Diameter (D) Length (L1) (Reference) Diameter Depth Max. Thickness (L2) Tension Resistance Shear Resistance
(mm) (N)
M6 35 65, 75, 85 10 35 3 10.5 40 L-50/- 2350 1770
M8 40 80,90,100 12 45 3 12.5 50 L-62/- 4310 3240
M10 50 95,110,125 14 55 3 14.5 60 L-75/L-83 6860 510
M12 52 110,130,150 18 65 4 19 75 L-90/L-100 10100 7260
M16 70 150,175 22 90 4 23 100 L-122/L-135 19020 14120

SBS is a professional expansion bolt manufacturer and supplier in China. Our company provides a variety of products, including truss steel structure building, ventilation ball, modified container house, EPS sandwich panel, and more.

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