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Hollow bar anchor body adopts the design of hollow rod body and drilling hole is a high-pressure feng shui channels and grouting, compared with the solid rod body, a hollow rod design can obtain better rigidity and shear strength.Plastic anchor head, anchor head check slurry made of rubber and plastic materials, plate is made of hot rolled plate forming, nut adopts hemisphere or hexagonal nut.Hollow bolt mechanical performance index according to customer requirements processing production, the length of the bolt according to the customer request processing, plate, nut, pulp plug, anchor head can be provided according to customer requirements.My company provides the common hollow grouting anchor, self-drilling anchor, T -thread self-drilling anchor, expansion shell anchor system, combination hollow grouting anchor and so on.For details, please query: http://www.sinorockbolt.com/products/