Sale 51mm Single High-Strength Block
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HARKEN51mm Single High-Strength Block


20% Off - Ends 06/20/21

Regular $104.40

In stock online.
Model # 359695 | Mfg # 308UPC # 97653010296
51mm Single High-Strength Block




51mm Single High-Strength Block

Name Value
Ball Bearings Delrin
Becket No Becket
Diameter 3/16 Inch or 5 mm
Direction Any
Integral Cleat No Integral Cleat
Mount Type Side Shackle
Ratchet Non Ratcheting
Safe Working Load 2000 Pounds
Sheave Diameter 50 mm
Type Single
Weight 5.25 Ounces

Product Overview

Harken 51mm Single High-Strength Block to carry wire halyards and high-strength control lines.

Harken's Lightweight, low-friction blocks with high-load composite bearings carry wire halyards and control line cascades. Side-load balls reduce friction from twists or unfair leads on 304-311. 300-303 has thrust washers. Blocks open to allow passage of swaged wire. Hard Lube-anodized sheave for strength and corrosion resistance. Cheek blocks include fasteners.

Key Features

  • Impregnated Hardkote anodized aluminum bearings
  • Side-load carbon-black Delrin® washers
  • Use for wire halyards, vangs, control lines
  • Polished stainless steel strap type fixed shackle
  • Sheave Diameter: 2" (51 mm) 
  • Max. Wire Diameter: 3/16" (5 mm)  
  • Max. Working Load (MWL): 2000 lb. (907 kg)  
  • Breaking Load: 4000 lb. (1814 kg)   
  • Weight: 5.25 oz. (149 g)


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