Series 40 All-Purpose Triple Block
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RONSTANSeries 40 All-Purpose Triple Block


In stock online.
Model # 271671 | Mfg # RF41300UPC # 9316800557424


Series 40 All-Purpose Triple Block

Name Value
Ball Bearings Plain Bearings
Becket No Becket
Diameter 7/16 Inch or 11 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 1543 Pounds
Sheave Diameter 40 mm
Type Triple
Weight 6.9 Ounces

Product Overview

Strong, compact all-purpose block for boats up to 26'.

Series 40 All-Purpose Triple Block. Ronstan's 40mm plain bearing blocks are strong and compact. Head post free swivels for correct load and sheet alignment. 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 nylon.

Key Features

  • Accepts line size of 7/16" (11mm)
  • Strong stainless steel and fiber-reinforced nylon cheek
  • Head post swivels for correct load and sheet alignment


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