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Home / Allen Blocks Allen Brothers Products Double Snatch Block Pulleys Everything No Boats New at Sailing Chandlery - Quality Sailing Items Out of Stock Sailing Pulleys & Blocks / Allen 40mm Dynamic Double Swivel Block - A20402
Allen 40mm Dynamic Double Swivel Block - A20402
Allen 40mm Dynamic Double Swivel Block - A20402
Allen 40mm Dynamic Double Swivel Block - A20402
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Allen 40mm Dynamic Double Swivel Block - A20402

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Rated 4.9 / 5
April Weekend Sale - Ends Monday
£84.88£93.37
Out of Stock
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90 Day Returns
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UK Next Day Delivery
Order within for UK Next Day Delivery by DHL
Our Guarantee

We want you back on the water as quickly as possible. We ship orders quickly, use fast postal services and show you accurate stock levels. This is why our customers rate us as 5 star.

Use our flexible payment options and take advantage of 90 day returns if you need to.

Lightning fast dispatch, getting you back on the water

Fast UK Delivery £4.50 or FREE if you spend over £95*

Price Match Promise

Related Products

Related Categories: Allen Blocks, Allen Brothers Products, Double Snatch Block Pulleys, Everything No Boats, New at Sailing Chandlery - Quality Sailing Items, Out of Stock, Sailing Pulleys & Blocks

Product Information

  • Allen 40mm Dynamic Double Swivel Block - A20402

    New for 2023. 40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines. Made from high-strength, lightweight glass-loaded nylon and featuring Allen’s dynamic bearing technology for a high-performance block suitable for keelboats and dinghies

    Key Features We Love

  • Bearings – Dynamic blocks feature our patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. The ball bearings are caged for further friction reduction. These features provide a superior load-carrying ability and longevity when compared to other bearing systems.
  • Swivel Head – Featuring a 360-degree swivel head with a 4mm shackle. The shackle is load rated higher than the block, so although it might look small, it’s plenty strong enough!
  • Becket – The 40mm range features a large central hole, which can be used as a becket (tying-off point). Specific becket variations are also available.

    • Specifications

    • Breaking Load - 1150kgs
    • Length - 93.55mm
    • Max Rope Diameter - 10mm
    • Shackle Pin Diameter - 5mm
    • Max Working Load - 500kgs
    • Weight - 102grams

Guaranteed For Life

Allen Guaranteed For Life

Allen products are warranted to be of merchantable quality and fit for the purpose for which they are sold. In addition, Allen products are guaranteed for life against defects in workmanship, subject to reasonable use. Allen will replace products which are found to have failed through manufacturing and raw material defects. The parts must have been fitted in accordance with the technical instructions, where present, and in any event following the technical guidance of our stockist or representative.

Why Sailing Chandlery

Fast Dispatch

FAST Dispatch

5 Star Rated

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90 Day Returns

90 Day Returns

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Delivery and Costs

Delivery and Costs

We try to treat delivery as a pass through cost and keep the cost to you as low as possible, on top of our already competitive product prices.

We offer free UK standard delivery for orders over £95 and includes most items. This does not include boats, trolleys, masts, booms, rig packages and large items which can't be sent via standard mail.

Any order placed by midday will leave us the same working day unless there is a lead time which we detail on the product page. We do not ship over the weekend or on bank holidays.

Delivery Costs

UK 2nd Class Delivery (2-5 days) - £4.50

UK 1st Class Delivery (1-3 days) - £5.50

DHL UK Mainland Next Day Courier - £8.99

Courier - Long Items - Masts, Booms, Rig Packages Etc - £40

Close to England - £10

Boats, trollies and trailers - These items cannot be sent using a post service, they have to be delivered by van. We can provide a custom delivery quotation if you can provide us with your post code. Please note, these items cannot be delivered outside of the UK. Please phone 01268 222912 for a quote.

We ship to other locations across the World.

If you would like to order an item and can't see your location simply drop us an email to info@sailingchandlery.com with the items you are planning on ordering and your address.

Frequently Asked Questions

Some frequently asked questions that other customers have asked us.

Frequently Asked Questions

What is the quantity for ropes?

We sell rope by the metre, the quantity is in metres. If you order 5 items you will receive one 5 metre continuous length of that specific rope.

How do I claim a discount?

All of our products are already competitively priced and provide excellent value. If you want to be the first to know about additional promotions simply sign up to our newsletter and we'll send you our offers to your inbox.

Do you ship to other locations?

As standard we ship to the UK, Ireland, USA, Canada, UAE, Australia and New Zealand.

We are always happy to provide you with a quote for shipping to other destinations, simply drop us an email to info@sailingchandlery.com with the items you are planning on ordering and your address. We can then work out a shipping quote for you and arrange payment for your order.

Who are Sailing Chandlery?

We're a team of sailors who are passionate about keeping you sailing and providing an excellent service first time. Find out more.

Have another question?
You can call the team on 01268 222912 or email us info@sailingchandlery.com

Customer Reviews

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why sailing chandlery?

Our small but dynamic team at Sailing Chandlery are here to offer you the best support for your sailing.

As a team we are passionate about giving you the service you deserve and getting you back on the water quickly.

Find out why our founder Andrew started the business.

Learn more about us

What our customer say about us

Don't take our word for it, see what our customers say about Sailing Chandlery and the service we provide

Sailing Chandlery

Great Service

Called SC to get advice on a piece of deck hardware. Was provided with good advice, items were in stock, good value and despatched same day. I was back racing for the weekend. Thank you

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Sailing Chandlery

I use Sailing Chandlery because they are consistently good

I use Sailing Chandlery because they have a good range at fair prices. If I need to call Sailing Chandlery staff have great product knowledge & despatch items promptly too 😀

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Sailing Chandlery

First experience of Sailing Chandlery…

I’ve never used Sailing Chandlery before but I certainly will again. It was very easy to place my order on line and better still the item I wanted was in stock in the correct size. Communication with the company was excellent and I was kept well informed about the status of my order. The goods were delivered very promptly and well packaged. Thank you

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Sailing Chandlery

Super fast delivery and a wide variety…

Super fast delivery and a wide variety of items so I got everything I needed the next day.

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