Allen 20mm Dynamic Bearing Blocks

Allen 20mm Dynamic Bearing Blocks
Dynamic blocks are stainless steel cheeks and inner bearing systems that can handle maximum loads. The cheeks feature an optimized rope guide with a larger hole to reduce the weight. Line friendly soft contours and articulation result in less line damage as it runs through the blocks.

Features a central hole for tie-on becket, which makes it great for use on a Laser Cunningham, for which it is the standard. High performance in design, these blocks are also very lightweight, making them great for dinghies and sport boats.


Part No. Description Length Line Diameter Shackle Pin  Breaking Load MDL Weight
mm in mm in mm in kg lbs g oz
HA2020 Single 37 1.46 2.5 - 6 1/8 - 1/4  - - 540 1,190 115 11.1 .39
HA2020LZ Single with Lacing Eye 41 1.61 2.5 - 6 1/8 - 1/4  - - 520 1,146 115 15.4 .54
HA2020SC Single with Swivel Head 49 1.93 2.5 - 6 1/8 - 1/4  4 5/32 350 772 115 15.4 .54
HA2020TI Ezi-Ti Block 45 1.77 2.5 - 6 1/8 - 1/4  - - 540 1,190 - 7.8 .28
HA2021 Multi Function 35 1.38 2.5 - 6 1/8 - 1/4  - - 350 772 115 11.5 .41
HA2021F Single with Fork Head 48 1.89 2.5 - 6 1/8 - 1/4  4 5/32 350 772 115 15.2 .54
HA2021HK Single with Hook 60 2.36 2.5 - 6 1/8 - 1/4  - - 165 364 115 17.5 .62
HA2021SC Single with Shackle Swivel Head 49 1.93 2.5 - 6 1/8 - 1/4  4 5/32 350 772 115 15.4 .54
HA2022 Double 49 1.93 2.5 - 6 1/8 - 1/4  - - 500 1,102 200 31.6 1.11
HA2023 Double with Becket 61 2.40 2.5 - 6 1/8 - 1/4  - - 500 1,102 225 33.5 1.18
HA2024 Triple 51 2.01 2.5 - 6 1/8 - 1/4 - - 650 1,433 300 47.9 1.69
HA2025 Triple with Fork 51 2.01 2.5 - 6 1/8 - 1/4 4 5/32 650 1,433 320 52.9 1.87
HA2026 Cheek Block 45 1.77 2.5 - 6 1/8 - 1/4 4 5/32 650 1,433 300 48 1.69
HA2027 Triple with Cleat and Becket 779 30.67 2.5 - 6 1/8 - 1/4 - - 650 1,433 320 86.9 3.07


HA2020 20mm Dynamic Block Price: $13.65 HA2020LZ 20mm Dyn Blk/spring standup Price: $22.30
HA2020SC 20mm Dynamic Swivel Block Price: $34.70 HA2020TI 20mm Dynamic EZI-TI Block Price: $15.18
HA2021 20mm Multi Function Dyn Block Price: $12.59 HA2021F 20mm Blk w/fork head Price: $21.91
HA2021HK 20mm Block w/Hook Price: $21.05 HA2021SC 20mm Dyn Multi Blk w/Shackle Price: $31.43
HA2022 20mm Dynamic Double Block Price: $34.81 HA2023 20mm Dynamic Dble Block w/ Bkt Price: $36.66
HA2024 20mm Dynamic Triple Block Price: $53.46 HA2025 20mm Dynamic Triple w/ Becket Price: $55.89
HA2026 20mm Dynamic Cheek Block Price: $21.62 HA2026PROFIX Cheek Adapter for HA2021 Price: $9.17
HA2027 20mm Treble Blk,Cleat&Becket Price: $121.78 HA5404S 4mm Shackle Head for HA2021 Price: $4.62
Allen 30mm Dynamic Bearing Blocks

Allen 30mm Dynamic Bearing Blocks
Dynamic blocks are stainless steel cheeks and inner bearing systems that can handle maximum loads. Line friendly soft contours and articulation result in less line damage as it runs through the blocks. Feature a central hole for tie-on becket. High performance, these blocks are also very lightweight.

Part No. Description Length Line Diameter Shackle Pin  Breaking Load MDL Weight
mm in mm in mm in kg lbs g oz
HA2030 Bullet Block 50 1.97 6 - 10 1/4 - 13/32 - - 750 1,653 140 26 .91
HA2030LZ Block with Lacing Eye with Spring 58 2.28 6 - 10 1/4 - 13/32 - - 500 1,102 140 30.2 1.07
HA2030SC Swivel Block 68 2.68 6 - 10 1/4 - 13/32 4 5/32 450 992 140 36 1.26
HA2031 Multi Function 48 1.89 6 - 10 1/4 - 13/32 4 5/32 750 1,653 140 28 .98
HA2031F Block with Fork 68 2.68 6 - 10 1/4 - 13/32 4 5/32 450 992 140 36 1.26
HA2032 Double 64 2.52 6 - 10 1/4 - 13/32 - - 1250 2,756 280 72 2.53
HA2033 Double with Becket 76 2.99 6 - 10 1/4 - 13/32 - - 1250 2,756 350 77 2.71
HA2034 Triple 67 2.64 6 - 10 1/4 - 13/32 - - 1750 3,858 420 103 3.63
HA2035 Triple with Becket 87 3.43 6 - 10 1/4 - 13/32 - - 1750 3,858 490 114 4.02
HA2036 Cheek Block with Profix 60 2.36 6 - 10 1/4 - 13/32 4 5/32 500 1,102 140 35 1.23
HA2036M Cheek 50 1.97 6 - 10 1/4 - 13/32 - - 400 882 140 24 .84
HA2037 Triple with Cleat and Becket 96 3.78 6 - 10 1/4 - 13/32 - - 1750 3,858 490 146 5.15
HA2039 Dynamic Linked 94 3.70 6 - 10 1/4 - 13/32 - - 750 1,653 140 52 1.83


HA2030 30mm Dynamic Single Block Price: $17.07 HA2030LZ 30mm Dynamic Single Standup Block Price: $27.54
HA2030SC 30mm Dynamic Single Swivel Block Price: $45.70 HA2031 30mm Dynamic Multi-Function Block Price: $15.43
HA2031F 30mm Dynamic Block With Fork Price: $22.61 HA2032 30mm Dynamic Double Block Price: $49.91
HA2033 30mm Dynamic Double w/ Becket Price: $44.61 HA2034 30mm Dynamic Triple Block Price: $72.09
HA2035 30mm Dynamic Triple Block w/Beckect Price: $76.18 HA2036 30mm Dynamic Cheek Block Price: $24.71
HA2036M 30mm Dynamic Cheek Block Price: $18.57 HA2036PROFIX Cheek Adapter for HA2031 Price: $14.03
HA2037 30mm Dynamic Triple Block w/Bkt & Cleat Price: $139.17 HA2039 30mm Dynamic Link Blocks Price: $37.11
Allen 40mm Dynamic Bearing Blocks

Allen 40mm Dynamic Bearing Blocks
Dynamic blocks are stainless steel cheeks and inner bearing systems that can handle maximum loads. Line friendly soft contours and articulation result in less line damage as it runs through the blocks. Feature a central hole for tie-on becket. High performance, these blocks are also very lightweight.

Part No. Description Length Line Diameter Shackle Pin  Breaking Load MDL Weight
mm in mm in mm in kg lbs g oz
HA2040 Single Block 64 2.52 6 - 10 1/4 - 13/32 - - 800 1764 180 36.4 1.28
HA2040B Bolt Block 64 2.52 6 - 10 1/4 - 13/32 - - 800 1764 180 37.2 1.31
HA2040SC Swivel Block 73 2.87 6 - 10 1/4 - 13/32 4 5/32 800 1764 180 46.5 1.64
HA2042 Double Block 84 3.31 6 - 10 1/4 - 13/32 - - 1350 2976 320 89.0 2.82
HA2046 Cheek Block 62 2.44 6 - 10 1/4 - 13/32 - - 800 1764 180 33.0 1.16


HA2040 40mm Dynamic Single Block Price: $40.89 HA2040B 40mm Dynamic Bolt Block Price: $45.52
HA2040SC 40mm Dynamic Swivel Block Price: $43.98 HA2042 40mm Dynamic Double Block Price: $87.76
HA2046 40mm Dynamic Cheek Block Price: $43.11
Allen 60mm Dynamic Bearing Blocks

Allen 60mm Dynamic Bearing Blocks
Dynamic blocks are stainless steel cheeks and inner bearing systems that can handle maximum loads. Line friendly soft contours and articulation result in less line damage as it runs through the blocks. Feature a central hole for tie-on becket. High performance, these blocks are also very lightweight.

Part No. Description Length Line Diameter Shackle Pin  Breaking Load MDL Weight
mm in mm in mm in kg lbs g oz
HA2060 Single 88 3.46 5 - 14 3/16 - 9/16 5 1/5 1000 2205 500 80 2.82
HA2062 Double 100 3.94 5 - 14 3/16 - 9/16 5 1/5 1250 2756 600 195 6.88
HA2064 Triple 100 3.94 5 - 14 3/16 - 9/16 5 1/5 1250 2756 600 - -
HA2068 Triple with Ratchet and Cleat 136 5.35 5 - 14 3/16 - 9/16 5 1/5 1250 2756 600 - -
HA2066 Quad 100 3.94 5 - 14 3/16 - 9/16 5 1/5 1250 2756 600 - -


HA2060 60mm Dynamic Single Block Price: $83.32 HA2062 60mm Dynamic Double Block Price: $162.27
HA2064 60mm Dynamic Triple Block Price: $237.77 HA2066 60mm Dynamic Quad Block Price: $274.45
HA2068 60mm Dynamic Triple Block w/BKT & Cleat Price: $430.08
Allen 20mm Through Deck and Upstand Blocks

Allen 20mm Through Deck and Upstand Blocks
Holt Allen's micro 20mm through deck and upstand blocks are made of composite filled nylon with 316 stainless steel straps. An easy application for through deck lines.

Part No. Description Length Line Diameter Shackle Pin  Breaking Load MDL Weight
mm in mm in mm in kg lbs g oz
HA4251 Micro Thru Deck 64 2.52 6 - 10 1/4 - 13/32 - - 800 1764 180 36.4 1.28
HA4451 Micro Thru Deck 64 2.52 6 - 10 1/4 - 13/32 - - 800 1764 180 37.2 1.31
HA4502 Micro Upstand Block 73 2.87 6 - 10 1/4 - 13/32 4 5/32 800 1764 180 46.5 1.64
HA4710 Micro Thru Deck 84 3.31 6 - 10 1/4 - 13/32 - - 1350 2976 320 89.0 2.82


HA4251 20mm Micro Thru Deck Block Price: $28.05 HA4451 20mm Micro Thru Deck Block Price: $65.32
HA4502 20mm Micro Upright Block Price: $27.02 HA4710 20mm Micro SS Thru Deck Block Price: $19.56
Allen 27mm Thru Deck and Midi Blocks

Allen 27mm Thru Deck and Midi Blocks
Dynamic Midi through deck blocks are designed to maximize efficiency under load with the dynamic bearing system. The exterior is lightweight yet durable. Ideal for sheet/halyard lead applications. Composite filled nylon with 316 stainless steel straps.

Part No. Description Length Line Diameter Breaking Load MDL Weight
mm in mm in kg lbs g oz
HA4101 Midi Upstand Block 45 1.77 6 1/4 850 1874 140 57 2.01
HA4701 Midi Thru Deck Sheave 80 3.15 6 1/4 850 1874 140 40 1.41
HA4801 Midi Thru Deck Block 45 1.77 6 1/4 850 1874 140 39 1.38
HA4901 Midi Thru Deck  98 3.86 6 1/4 850 1874 140 41 1.45
HA4978 Midi Flip FLop 63 2.48 6 1/4 850 1874 140 58 2.05


HA4101 27mm Midi Upright Block Price: $41.80 HA4701 27mm Through Deck Lead Price: $30.01
HA4801 27mm SingleThru-Deck Block Price: $31.79 HA4901 27mm Double Through Deck Lead Price: $38.64
HA4978 27mm Flip-Flop Block Price: $42.18
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