Single block A4409

plain bearingfor sailboatshalyard

A4409 Sheave Boxes Stainless Steel Sheave Box - Plain Bearing Sheave Boxes Allen Sheave Boxes are available with a plain bearing or ball bearing sheave. We also have the following choice of sheave material to suit your application: Acetal Resin, Stainless Steel and Alloy. Sheave boxes are suitable for all types of halyard systems, control line systems and general running rigging. The low profile range of sheave boxes feature our unique hook-in cage; designed to deal with the high loads of modern rigs. * Working and breaking loads are very dependent on the fixing of the sheave box. * When using an aluminium sheave box with carbon rigging or decking insure it should be isolated with a suitable product to reduce electrolytic action. Mast Head High quality in house injection moulded nylon 6 mast head crane and sheave box with optional insert moulding to fit larger diameter tubes.