16 mm Flip-Flop Block
Mouse Over to Zoom
Click to Enlarge

HARKEN16 mm Flip-Flop Block


In stock online.
Model # 5400031 | Mfg # 437UPC # 97653071495
16 mm Flip-Flop Block




16 mm Flip-Flop Block

Name Value
Ball Bearings Stainless Steel
Becket No Becket
Diameter 3/16 Inch or 5 mm
Direction Any
Integral Cleat No Integral Cleat
Length 1 5/16 Inches
Mount Type Mechanical Fasteners
Ratchet Non Ratcheting
Safe Working Load 250 Pounds
Sheave Diameter 16 mm
Type Single Pivoting
Weight 0.75 Ounce

Product Overview

Harken 16mm Flip-Flop Block is Harken's tiniest pivoting lead block.

16mm Blocks have a lightweight design and a unique patented bearing system which uses stainless steel balls in a captive, grooved race. Very high working loads in an extremely lightweight block, with the best strength-to-weight ratios around. Use with small synthetic control lines found on high-tech dinghies. 

Key Features

  • Very high working loads in an extremely lightweight block
  • Lightweight design and a unique patented bearing system 
  • Stainless steel ball bearings
  • Polished 316 stainless steel mount
  • Sheave Diameter: 5/8" (16 mm) 
  • Max. Line Diameter: 7/32" (5 mm)  
  • Max. Working Load (MWL): 250 lb. (113 kg)  
  • Breaking Load: 1200 lb. (544 kg)   
  • Weight: .75 oz. (21 g) 
  • Length: 1 5/16" (34 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.

Related West Advisor Articles


Product Q & A