Sailing Single Blocks

Sailing Single Blocks
  • Harken® - Element Single Utility Block with Swivel Shackle for 1/2" D Lines
    Harken®Element Single Utility Block with Swivel Shackle for 1/2" D Lines (6230)
    0
    # mpn4648844656
    Element Single Utility Block with Swivel Shackle for 1/2" D Lines by Harken®. Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust....
    High quality at an affordable priceExpertly made from premium materials
    $42.80
  • Harken® - Element Single Utility Block with Swivel Shackle for 9/16" D Lines
    Harken®Element Single Utility Block with Swivel Shackle for 9/16" D Lines (6260)
    0
    # mpn4702351760
    Element Single Utility Block with Swivel Shackle for 9/16" D Lines by Harken®. Element blocks introduce sideplates that combine forged aluminum and compound curves for strength. They are simultaneously contemporary and very robust....
    High quality at an affordable priceExpertly made from premium materials
    $60.15
  • Harken® - Fiddle Block with Becket, Loop Head & V-Jam Cleat for 1/4" D Lines
    Harken®Fiddle Block with Becket, Loop Head & V-Jam Cleat for 1/4" D Lines (245)
    0
    # mpn4648844627
    Fiddle Block with Becket, Loop Head & V-Jam Cleat for 1/4" D Lines by Harken®. Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all...
    High quality at an affordable priceExpertly made from premium materials
    $45.95
  • Harken® - Fiddle Block with Loop Head & V-Jam Cleat for 1/4" D Lines
    Harken®Fiddle Block with Loop Head & V-Jam Cleat for 1/4" D Lines (244)
    0
    # mpn4648844626
    Fiddle Block with Loop Head & V-Jam Cleat for 1/4" D Lines by Harken®. Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. If...
    High quality at an affordable priceExpertly made from premium materials
    $41.95
  • Harken® - Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 3/8" D Lines
    Harken®Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 3/8" D Lines (126)
    0
    # mpn4757405331
    Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 3/8" D Lines by Harken®. Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A...
    High quality at an affordable priceExpertly made from premium materials
    $39.95
  • Harken® - Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 5/16" D Lines
    Harken®Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 5/16" D Lines (083)
    0
    # mpn4757405328
    Plain Bearing Sheave Single Utility Block with Loop Head & Becket for 5/16" D Lines by Harken®. Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A...
    High quality at an affordable priceExpertly made from premium materials
    $22.95
  • Harken® - Plain Bearing Sheave Single Utility Block with Loop Head for 3/8" D Lines
    Harken®Plain Bearing Sheave Single Utility Block with Loop Head for 3/8" D Lines (125)
    0
    # mpn4757405342
    Plain Bearing Sheave Single Utility Block with Loop Head for 3/8" D Lines by Harken®. Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of...
    High quality at an affordable priceExpertly made from premium materials
    $34.95
  • Harken® - Plain Bearing Sheave Single Utility Block with Loop Head for 5/16" D Lines
    Harken®Plain Bearing Sheave Single Utility Block with Loop Head for 5/16" D Lines (082)
    0
    # mpn4757405329
    Plain Bearing Sheave Single Utility Block with Loop Head for 5/16" D Lines by Harken®. Low-friction Bullet blocks lead control lines aft. They are compact and lightweight, with fast trim and release under high or low loads. A range of...
    High quality at an affordable priceExpertly made from premium materials
    $19.95
  • Harken® - Single Utility Block with Becket & Loop Head for 1/4" D Lines
    Harken®Single Utility Block with Becket & Loop Head for 1/4" D Lines (225)
    0
    # mpn4648844619
    Single Utility Block with Becket & Loop Head for 1/4" D Lines by Harken®. Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. If...
    High quality at an affordable priceExpertly made from premium materials
    $16.95
  • Harken® - Single Utility Block with Becket & Loop Head for 7/32" D Lines
    Harken®Single Utility Block with Becket & Loop Head for 7/32" D Lines (405)
    0
    # mpn4648844646
    Single Utility Block with Becket & Loop Head for 7/32" D Lines by Harken®. The 16 mm is Harken's smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless...
    High quality at an affordable priceExpertly made from premium materials
    $19.95
  • Harken® - Single Utility Block with Loop Head for 1/4" D Lines
    Harken®Single Utility Block with Loop Head for 1/4" D Lines (224)
    0
    # mpn4648844618
    Single Utility Block with Loop Head for 1/4" D Lines by Harken®. Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. If you’re...
    High quality at an affordable priceExpertly made from premium materials
    $13.95
  • Harken® - Single Utility Block with Loop Head for 7/32" D Lines
    Harken®Single Utility Block with Loop Head for 7/32" D Lines (404)
    0
    # mpn4648844645
    Single Utility Block with Loop Head for 7/32" D Lines by Harken®. The 16 mm is Harken's smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls...
    High quality at an affordable priceExpertly made from premium materials
    $16.95
  • Harken® - Single Utility Block with Swivel Shackle for 1/4" D Lines
    Harken®Single Utility Block with Swivel Shackle for 1/4" D Lines (292)
    0
    # mpn4648844634
    Single Utility Block with Swivel Shackle for 1/4" D Lines by Harken®. Low-friction Micro blocks are compact and lightweight. They are ideal for sailboards, smaller dinghies, and lightly loaded control lines on boats of all sizes. If...
    High quality at an affordable priceExpertly made from premium materials
    $28.95
  • Harken® - Single Utility Block with Swivel Shackle for 7/32" D Lines
    Harken®Single Utility Block with Swivel Shackle for 7/32" D Lines (417)
    0
    # mpn4648844651
    Single Utility Block with Swivel Shackle for 7/32" D Lines by Harken®. The 16 mm is Harken's smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel...
    High quality at an affordable priceExpertly made from premium materials
    $30.95
  • Harken® - Single Utility Block with Tube Rivet Head for 7/32" D Lines
    Harken®Single Utility Block with Tube Rivet Head for 7/32" D Lines (376)
    0
    # mpn4648844642
    Single Utility Block with Tube Rivet Head for 7/32" D Lines by Harken®. The 16 mm is Harken's smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel...
    High quality at an affordable priceExpertly made from premium materials
    $23.95
  • Harken® - Single Wire Block with Loop Head for 3/32" D Cables
    Harken®Single Wire Block with Loop Head for 3/32" D Cables (300)
    0
    # mpn4648844635
    Single Wire Block with Loop Head for 3/32" D Cables by Harken®. Lightweight, low-friction wire blocks carry wire halyards and high-strength control lines on boats of all sizes. If you’re an avid sailboat enthusiast looking to enhance...
    High quality at an affordable priceExpertly made from premium materials
    $45.95
  • Ronstan® - 1/16"-3/16" D Blue Shock Block
    Ronstan®1/16"-3/16" D Blue Shock Block (RF8080BLU-2)
    0
    # mpn4630540925
    1/16"-3/16" D Blue Shock Block (RF8080BLU-2) by Ronstan®. 2 Pieces. The obvious choice for those kitesurfers, paragliders, control line deflections and purchase systems that require a lightweight high load capacity block. If you’re an...
    Performance & versatilityUltra lightweight
    $19.63
  • Ronstan® - 1/16"-3/16" D Gray Shock Block
    Ronstan®1/16"-3/16" D Gray Shock Block (RF8080GRY-2)
    0
    # mpn4630540926
    1/16"-3/16" D Gray Shock Block (RF8080GRY-2) by Ronstan®. 2 Pieces. The obvious choice for those kitesurfers, paragliders, control line deflections and purchase systems that require a lightweight high load capacity block. If you’re an...
    Performance & versatilityUltra lightweight
    $19.63
  • Ronstan® - 1/16"-3/16" D Red Shock Block
    Ronstan®1/16"-3/16" D Red Shock Block (RF8080R-2)
    0
    # mpn4630540927
    1/16"-3/16" D Red Shock Block (RF8080R-2) by Ronstan®. 2 Pieces. The obvious choice for those kitesurfers, paragliders, control line deflections and purchase systems that require a lightweight high load capacity block. If you’re an...
    Performance & versatilityUltra lightweight
    $19.63
  • Ronstan® - 1/8"-3/8" D Blue Shock Block
    Ronstan®1/8"-3/8" D Blue Shock Block (RF8081BLU)
    0
    # mpn4630540928
    1/8"-3/8" D Blue Shock Block (RF8081BLU) by Ronstan®. 1 Piece. The obvious choice for those kitesurfers, paragliders, control line deflections and purchase systems that require a lightweight high load capacity block. If you’re an avid...
    Performance & versatilityUltra lightweight
    $14.46
  • Ronstan® - 1/8"-3/8" D Red Shock Block
    Ronstan®1/8"-3/8" D Red Shock Block (RF8081R)
    0
    # mpn4630540929
    1/8"-3/8" D Red Shock Block (RF8081R) by Ronstan®. The obvious choice for those kitesurfers, paragliders, control line deflections and purchase systems that require a lightweight high load capacity block. If you’re an avid sailboat...
    Performance & versatilityUltra lightweight
    $14.46
  • Ronstan® - 15 Series Ball Bearing Shave Single Pivoting Lead Block for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Pivoting Lead Block for 3/16" D Lines (RF15174)
    0
    # mpn4630540557
    15 Series Ball Bearing Shave Single Pivoting Lead Block for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on our virtual...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $36.57
  • Ronstan® - 15 Series Ball Bearing Shave Single Upright Lead Block for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Upright Lead Block for 3/16" D Lines (RF15171)
    0
    # mpn4630540556
    15 Series Ball Bearing Shave Single Upright Lead Block for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on our virtual...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $20.73
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Becket & Loop Head for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Becket & Loop Head for 3/16" D Lines (RF15111)
    0
    # mpn4630540553
    15 Series Ball Bearing Shave Single Utility Block with Becket & Loop Head for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $14.18
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Cheek & Stand-Up Head for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Cheek & Stand-Up Head for 3/16" D Lines (RF15141)
    0
    # mpn4630540554
    15 Series Ball Bearing Shave Single Utility Block with Cheek & Stand-Up Head for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $18.55
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Cheek for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Cheek for 3/16" D Lines (RF15151)
    0
    # mpn4630540555
    15 Series Ball Bearing Shave Single Utility Block with Cheek for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on our...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $15.28
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Cover Plate for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Cover Plate for 3/16" D Lines (RF15711)
    0
    # mpn4630540565
    15 Series Ball Bearing Shave Single Utility Block with Cover Plate for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on our...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $31.11
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Loop Head for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Loop Head for 3/16" D Lines (RF15101)
    0
    # mpn4630540552
    15 Series Ball Bearing Shave Single Utility Block with Loop Head for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on our...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $11.98
  • Ronstan® - 15 Series Ball Bearing Shave Single Utility Block with Swivel Shackle for 3/16" D Lines
    Ronstan®15 Series Ball Bearing Shave Single Utility Block with Swivel Shackle for 3/16" D Lines (RF15100)
    0
    # mpn4630540551
    15 Series Ball Bearing Shave Single Utility Block with Swivel Shackle for 3/16" D Lines by Ronstan®. If you’re an avid sailboat enthusiast looking to enhance your experience on the water, then top-quality sailing products offered on...
    Smallest and lightest ball bearing block availablePrecision moulded acetal sheave running on stainless steel ball bearings provide high performance & low friction
    $20.98
  • Ronstan® - 19 Series Acetal Sheave Single Utility Block with Ferrule Eye Head for 3/16" D Lines
    Ronstan®19 Series Acetal Sheave Single Utility Block with Ferrule Eye Head for 3/16" D Lines (RF663)
    0
    # mpn4630540901
    19 Series Acetal Sheave Single Utility Block with Ferrule Eye Head for 3/16" D Lines by Ronstan®. Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase. Stainless steel...
    Lightweight durable constructionEconomical
    $18.87




Blocks are essential devices in sailing. Essentially, a block is a pulley; typically, it consists of a frame containing a grooved wheel that can accommodate a line. Assemblies with only one wheel or sheave are called single blocks. You can find them all over a sailboat; they are used to lift loads or maneuver sheets with minimal friction regardless of which direction the rope moves in. They can also be used in combination. Single sailing blocks can be made of different materials, including metal, wood, and plastic. Typically, their names imply their function.

For example, there are fiddle, linked, shock, spinnaker, utility, and simple sheave blocks, among other types. On our virtual shelves, we have selected a broad choice of quality single sailing blocks to fit every type of vessel. The features defining the blocks include the line diameter, sheave type, maximum load, and other specific characteristics. Depending on the purpose and task, there are blocks with a back plate, becket, snap shackle, and swivel fork, among others. We offer exclusive products made by trusted companies, tested to meet or exceed industry standards, and built to deliver performance and long-lasting efficiency.

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