We Ship Worldwide! | FREE SHIPPING! for US Continental orders over $150. Click for details.

SAILOR'S GARAGE CLEANOUT

Save up to 80% off

Allen 20 mm Dynamic Block Back To Back

SKU: ALL-A2028  |  Manuf. Code: A2028
$30.95 USD

Description

20mm Back To Back Dynamic Block.

The sheaves face opposite directions to allow two control lines to run at a maximum of 180 degrees to each other. Held together with a strong stainless steel side strap and nylon mouldings ensures the block will not separate even under two very high opposing loads.

The strength of the design lends itself to be tied around the middle in the slight V shape, meaning it can be used in applications such as triangle backstay systems found on sports boats.

One of the more popular applications is in a dual pole and spinnaker launcher system such as the system commonly found on a 49er.

Our Part # ALL-A2028 | Mfr. Part # A2028

Features

  • Bearings: Dynamic Blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. This provides a superior load-carrying ability and longevity when compared to other bearing systems which run on a plastic rail.
  • Ultra-Strap: Our patented Ultra-Strap is used in our 20, 30 & 40mm Dynamic blocks. The Ultra-Strap is unique when compared to other designs because of its coining process. This process strengthens the strap, making it more reliable and hard-wearing as well as making it much more rope friendly than other designs. The Ultra-Strap was the first marine industry block designed to work specifically with a rope attachment.

Technical Information

DescriptionImperialMetric
Breaking load1190.7 lbs.540.0 kg
Length2 1/16 in52.0 mm
Maximum line diameter1/4 in6.0 mm
Maximum working load253.58 lbs.115.0 kg
Weight0.71 oz20.0 g