| 摘要 |
C :NRPotnbDCCPLA3334906_ .DOC-23/02/2011 -8 A connection between metal members assembled together to form a building component, wherein each of the members is formed with a hole of generally star-shaped profile 5 providing a series of inwardly-directed angularly-spaced teeth to receive a screw fastener passing through the holes of the two members to connect the members, the teeth of the two members being in face-to-face engagement and each tooth having a tip having a concave curvature of a diameter approximately the same as the root diameter of the thread of the screw. C/J |
