Abstract: Block lock (100) for round steel chains, having two half elements (10) which are displaceable relative to one another for opening and closing the block lock (100) and which each have ends connected to one another via a longitudinal web (10.1), of which in each case one end has an insertion plug (11) with a width reduced in relation to the longitudinal web and with retaining webs (13.1, 13.2) integrally formed on both sides, wherein at least two parallel retaining webs (13.1, 13.2) are arranged above one another on each side, and of which in each case the other end has a receiving pocket (12) which serves to receive the insertion plug (11) and on the two lateral inner flanks of which there are in each case formed at least two retaining grooves (14.1, 14.2) above one another to form a toothing by receiving the retaining webs (13.1, 13.2). A central web (10.2) extends inwardly from at least one longitudinal web (10.1). The insertion plug (11) widens, as seen in side view, from the longitudinal web (10.

Abstract: This invention relates to a connector, particularly to a shackle suitable for use in connecting two links of a chain or a chain to an anchor, more particularly to a connector comprising a first portion and a second portion, at least one first connector arm on the first portion and at least one second connector arm on the second portion, wherein both the first and second connector arms have multiple bearing surfaces, preferably six, and are able to engage one another when the connector is coupled by means of the bearing surfaces. The connector of the present invention has the advantage of having a break load of 1.3[0.0274 d2(44?0.08 d) kN, wherein d is the nominal diameter, and preferably a thickness of 1.3 d.