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A20403B

40mm Triple Dynamic Block - Becket

40mm Triple Dynamic Block - Becket

£117.20 ex VAT £140.64 inc VAT
ex VAT £0.00 inc VAT £117.20 ex VAT £140.64 inc VAT
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In stock - 11 units(Can be backordered)

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Description

40mm Triple Dynamic Swivel Block With Becket

The 40mm Triple Dynamic Swivel Block With Becket is a high-performance, triple-sheave pulley designed for keelboats and dinghies. Manufactured from durable, lightweight glass-loaded nylon and featuring Allen's advanced Dynamic Bearing Technology, it delivers smooth, efficient line handling for mainsheets, jib sheets, spinnaker sheets, and control line systems.

The integrated becket makes it ideal for creating compact purchase systems for backstay, cunningham, outhaul, and vang controls, while the swivel head ensures optimal alignment under changing load angles.

Key Features

  • Triple-sheave design for high-purchase systems and increased mechanical advantage
  • Manufactured from durable, lightweight glass-loaded nylon
  • Ideal for mainsheet, vang, cunningham, backstay, and keelboat control line applications
  • Patented Dynamic Bearing System featuring twin rows of stainless-steel ball bearings running on a stainless-steel rail
  • Caged ball bearings for reduced friction and enhanced rolling performance
  • Superior load-carrying capability and long service life
  • 360° Swivel Head fitted with a 5mm shackle for flexible attachment and optimal load alignment
  • Shackle is load-rated higher than the block for added reliability
  • Swivel Lock System allows the shackle to be locked in 90° orientations when required
  • Swivel lock can be removed easily by undoing the shackle and removing it from the swivel pin
  • Integrated Becket for creating purchase systems and convenient tie-off points
  • Ideal for backstay, cunningham, outhaul, and vang control systems
  • Low-friction, fast-rolling performance for smooth operation under load
  • Designed for reliable performance in demanding marine environments
  • Perfect for high-load control systems requiring efficient purchase, secure attachment, and precise line control
Accessories Becket, Swivel
Bearing type Dynamic
Brand Allen
Breaking load kg 1400
Configuration Triple
Height mm 109
Iges file link https://abassets.ams3.digitaloceanspaces.com/iges/a20403b.igs
Length mm 110.05
Maximum line diameter mm 10
Maximum working load kg 750
Pdf GenericFileDrop
Pdf ref link https://abassets.ams3.digitaloceanspaces.com/product_files/a20403b-ref_2.pdf
Pin size mm 5
Related collection CollectionDrop
Sheave diameter mm 40
Sheave material Acetal
Width mm 60
Swipe
SKU Title Breaking Load Kg Max Working Load Kg Hole Pitch mm Length mm Max Line Dia mm Pin Size mm Weight (g) Price
A20401S-2030

40 & 30mm Single Dynamic Blocks - Linked

 780 140 - 108 8 - 64
£50.72 ex VAT £60.86 inc VAT
ex VAT £0.00 inc VAT £50.72 ex VAT £60.86 inc VAT
A20402

40mm Double Dynamic Block

 1150 500 - 93.55 10 5 100
£76.79 ex VAT £92.15 inc VAT
ex VAT £0.00 inc VAT £76.79 ex VAT £92.15 inc VAT
A20402B

40mm Double Dynamic Block - Becket

 1150 500 - 110.05 10 5 113
£78.88 ex VAT £94.66 inc VAT
ex VAT £0.00 inc VAT £78.88 ex VAT £94.66 inc VAT
A20404

40mm Quad Dynamic Block

 1400 750 - 95.05 10 5 213
£153.56 ex VAT £184.27 inc VAT
ex VAT £0.00 inc VAT £153.56 ex VAT £184.27 inc VAT
A20401

40mm Single Dynamic Block

 780 240 - 83.38 10 4 54
£38.39 ex VAT £46.07 inc VAT
ex VAT £0.00 inc VAT £38.39 ex VAT £46.07 inc VAT
A20401B

40mm Single Dynamic Block - Becket

 780 240 - 99.88 10 4 59
£40.48 ex VAT £48.58 inc VAT
ex VAT £0.00 inc VAT £40.48 ex VAT £48.58 inc VAT
A20401B-77

40mm Single Dynamic Block - Becket, Cleat

 780 80 - 99.88 6 4 122
£94.14 ex VAT £112.97 inc VAT
ex VAT £0.00 inc VAT £94.14 ex VAT £112.97 inc VAT
A20401BF

40mm Single Dynamic Block - Becket, Fiddle

 780 240 - 126.88 10 4 73
£57.39 ex VAT £68.87 inc VAT
ex VAT £0.00 inc VAT £57.39 ex VAT £68.87 inc VAT
A20401BF-77

40mm Single Dynamic Block - Becket, Fiddle, Cleat

 780 80 - 126.88 6 4 141
£109.55 ex VAT £131.46 inc VAT
ex VAT £0.00 inc VAT £109.55 ex VAT £131.46 inc VAT
A20401BFH-77

40mm Single Dynamic Block - Becket, Fiddle, Hook, Cleat

 540 80 - 153 6 4 172
£114.77 ex VAT £137.72 inc VAT
ex VAT £0.00 inc VAT £114.77 ex VAT £137.72 inc VAT
A20401C

40mm Single Dynamic Block - Cheek

 780 240 35.5 62 10 - 36
£35.54 ex VAT £42.65 inc VAT
ex VAT £0.00 inc VAT £35.54 ex VAT £42.65 inc VAT
A20401CB

40mm Single Dynamic Block - Cheek, Becket

 780 240 62.5 X 14.6 73 10 - 41
£37.63 ex VAT £45.16 inc VAT
ex VAT £0.00 inc VAT £37.63 ex VAT £45.16 inc VAT
A20401-77

40mm Single Dynamic Block - Cleat

 750 80 - 83.38 6 4 118
£92.07 ex VAT £110.48 inc VAT
ex VAT £0.00 inc VAT £92.07 ex VAT £110.48 inc VAT
A20401F

40mm Single Dynamic Block - Fiddle

 780 240 - 108.38 10 4 68
£50.96 ex VAT £61.15 inc VAT
ex VAT £0.00 inc VAT £50.96 ex VAT £61.15 inc VAT
A20401F-77

40mm Single Dynamic Block - Fiddle, Cleat

 780 80 - 108.38 6 4 136
£104.58 ex VAT £125.50 inc VAT
ex VAT £0.00 inc VAT £104.58 ex VAT £125.50 inc VAT
A20401H

40mm Single Dynamic Block - Hook

 540 250 - 109 10 - 73
£43.60 ex VAT £52.32 inc VAT
ex VAT £0.00 inc VAT £43.60 ex VAT £52.32 inc VAT
A20401BFH

40mm Single Dynamic Block - Hook, Becket, Fiddle

 540 240 - 153 6 4 91
£62.60 ex VAT £75.12 inc VAT
ex VAT £0.00 inc VAT £62.60 ex VAT £75.12 inc VAT
A20401FH

40mm Single Dynamic Block - Hook, Fiddle

 540 240 - 134 6 4 86
£56.18 ex VAT £67.42 inc VAT
ex VAT £0.00 inc VAT £56.18 ex VAT £67.42 inc VAT
A20401FH-77

40mm Single Dynamic Block - Hook, Fiddle, Cleat

 540 80 - 134 6 4 154
£109.80 ex VAT £131.76 inc VAT
ex VAT £0.00 inc VAT £109.80 ex VAT £131.76 inc VAT
A20401SR

40mm Single Dynamic Block - Removable Strap

 700 240 - 64 10 - 41
£37.55 ex VAT £45.06 inc VAT
ex VAT £0.00 inc VAT £37.55 ex VAT £45.06 inc VAT
A20401SLZ

40mm Single Dynamic Block - Stand Up

 700 240 36.25 74 10 - 45
£38.88 ex VAT £46.66 inc VAT
ex VAT £0.00 inc VAT £38.88 ex VAT £46.66 inc VAT
A20401S

40mm Single Dynamic Block - Strap

 700 240 - 64.5 10 - 41
£33.74 ex VAT £40.49 inc VAT
ex VAT £0.00 inc VAT £33.74 ex VAT £40.49 inc VAT
A2040Tii

40mm Single Dynamic Block - Tii-On

 800 180 - 58 10 - 36
From £33.74 ex VAT £40.49 inc VAT
ex VAT £0.00 inc VAT From £33.74 ex VAT £40.49 inc VAT
A20401HL

40mm Single High Load Block

 780 360 - 83.38 10 4 77
£59.18 ex VAT £71.02 inc VAT
ex VAT £0.00 inc VAT £59.18 ex VAT £71.02 inc VAT
A20401CHL

40mm Single High Load Block - Cheek

 780 360 35.5 62 10 - 54
£54.85 ex VAT £65.82 inc VAT
ex VAT £0.00 inc VAT £54.85 ex VAT £65.82 inc VAT
A20401SRHL

40mm Single High Load Block - Removable Strap

 700 360 - 64.5 10 - 64
£56.45 ex VAT £67.74 inc VAT
ex VAT £0.00 inc VAT £56.45 ex VAT £67.74 inc VAT
A20401SHL

40mm Single High Load Block - Strap

 700 360 - 64.5 10 - 63
£52.65 ex VAT £63.18 inc VAT
ex VAT £0.00 inc VAT £52.65 ex VAT £63.18 inc VAT
A2040TiiHL

40mm Single High Load Block - Tii-On

 800 360 - 58 10 - 41
£54.50 ex VAT £65.40 inc VAT
ex VAT £0.00 inc VAT £54.50 ex VAT £65.40 inc VAT
A2040XHL-B

40mm Single XHL Block

 1500 650 - 54 8 - 73
£161.40 ex VAT £193.68 inc VAT
ex VAT £0.00 inc VAT £161.40 ex VAT £193.68 inc VAT
A20403

40mm Triple Dynamic Block

 1400 750 - 93.35 10 5 159
£115.18 ex VAT £138.22 inc VAT
ex VAT £0.00 inc VAT £115.18 ex VAT £138.22 inc VAT
A20403B

40mm Triple Dynamic Block - Becket

 1400 750 - 110.05 10 5 163
£117.20 ex VAT £140.64 inc VAT
ex VAT £0.00 inc VAT £117.20 ex VAT £140.64 inc VAT
A20403B-77

40mm Triple Dynamic Block - Becket, Cleat

 1400 750 - 110.5 6 5 240
£183.50 ex VAT £220.20 inc VAT
ex VAT £0.00 inc VAT £183.50 ex VAT £220.20 inc VAT
A20403-77

40mm Triple Dynamic Block - Cleat

 1400 750 - 93.35 6 5 240
£181.47 ex VAT £217.76 inc VAT
ex VAT £0.00 inc VAT £181.47 ex VAT £217.76 inc VAT
ATII-LOCK-40

Tii-Lock-40

 - - - - - - -
£3.75 ex VAT £4.50 inc VAT
ex VAT £0.00 inc VAT £3.75 ex VAT £4.50 inc VAT