29mm Single Bullet Block, Swivel
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HARKEN29mm Single Bullet Block, Swivel


In stock online.
Model # 153734 | Mfg # 166UPC # 97653005186
29mm Single Bullet Block, Swivel


4.7 Stars


29mm Single Bullet Block, Swivel

Name Value
Ball Bearings Delrin
Becket No Becket
Diameter 5/16 Inch
Direction Any
Integral Cleat No Integral Cleat
Length 2 3/4 Inches
Mount Type Swivel Shackle
Ratchet Non Ratcheting
Safe Working Load 300 Pounds
Sheave Diameter 29 mm
Type Single
Weight 1.5 Ounces

Product Overview

The Harken 166 29mm Single Bullet Block with Swivel is a simple, classic and reliable workhorse found on sailboats of all sizes.

Harken designed their low-friction Bullet Blocks to lead control lines aft, but these truly Classic blocks can be found in an endless variety of applications. They are compact and lightweight, with free-running ball bearings that roll on flat races with minimal friction. They deliver dependable fast trim and release under high or low loads.

A range of styles lets these blocks adapt to almost all control line applications. Ideal for cunninghams, vangs, outhauls, traveler controls, spinnaker controls, barberhaulers, etc. 

Key Features

  • Extremely popular single block found on sailboats of all sizes
  • Swivel shackle allows the block to rotate and to be easily attached and removed
  • Used on many types of control systems
  • Corrosion-resistant stainless steel straps reinforce these blocks
  • Ball bearings, sheave and sideplates are UV stabilized
  • Fast trim and release under load: Free-running ball bearings roll on flat races with minimal friction
  • Sheave Diameter: 1 1/8" (29 mm)
  • Max. Line Diameter: 5/16" (8 mm)
  • Max. Working Load (MWL): 300 lb. (136 kg)
  • Breaking Load: 2000 lb. (907 kg)
  • Weight: 1.5 oz. (43 g)
  • Length: 2 3/4" (70 mm)
  • Shackle Pin: 3/16" (5 mm)


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