Series 40 All-Purpose Double Block. Ronstan's 40mm plain bearing blocks are strong and compact. Smart features include a unique captive lock universal head. For dinghies and keelboats up to 26'. 1 9/16" (40mm) sheave is made from UV-stabilized acetal and accepts a line size of 7/16" (11mm). Cheek is made from stainless steel and fiber-reinforced textured Zytel.
|Ball Bearings||Plain Bearings|
|Diameter||7/16 Inch or 11 mm|
|Integral Cleat||No Integral Cleat|
|Mount Type||Swivel Shackle|
|Safe Working Load||1323 Pounds|
|Sheave Diameter||40 mm|
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.