Blocks

Harken blocks have become widely accepted as the industry standard for ball bearing blocks.  We, at Discount Marine Source, are you complete source for all Harken Blocks. From the smallest control line block on a dinghy, to large Big Boat Blocks.

Ball Bearing Blocks

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Harken, 3.00 Midrange Hexaratchet Block - Stbd, 1549

Harken, 3.00 Midrange Hexaratchet Block - Stbd, 1549

Description: Cheek*Sheave dia. (in): 3Sheave dia. (mm): 76Length (in): 4 3/8Length (mm): 111Weight (..

$228.95

Harken, 3.00 Midrange Hexaratchet w-Becket - Stbd, 1550

Harken, 3.00 Midrange Hexaratchet w-Becket - Stbd, 1550

Description: SingleSheave dia. (in): 3Length (in): 6 1/8Length (mm): 156Weight (oz): 14Weight (g): 3..

$240.95

Harken, 3.00 Midrange Triple Block, 1546

Harken, 3.00 Midrange Triple Block, 1546

Description: Double/becketSheave dia. (in): 3Sheave dia. (mm): 76Length (in): 8 1/2Length (mm): 216W..

$429.95

Harken, 3.00 Midrange Triple w-Hex Cam Cleat and Becket, 1556

Harken, 3.00 Midrange Triple w-Hex Cam Cleat and Becket, 1556

Description: Triple/ratchet/camSheave dia. (in): 3Sheave dia. (mm): 76Length (in): 7 3/4Length (mm):..

$706.95

Harken, 3.00 Midrange Triple w-Hexaratchet and Cam Cleat, 1555

Harken, 3.00 Midrange Triple w-Hexaratchet and Cam Cleat, 1555

Description: Single/becketSheave dia. (in): 3Sheave dia. (mm): 76Length (in): 7 1/8Length (mm): 184W..

$695.95

Harken, 3.00 Single Block, 005

Harken, 3.00 Single Block, 005

Description: Double/becketSheave dia. (in): 2 1/4Sheave dia. (mm): 57Length (in): 5 1/2Length (mm): ..

$89.20

Harken, 3.00 Single Midrange Block w-Aluminum Sheave, 1542

Harken, 3.00 Single Midrange Block w-Aluminum Sheave, 1542

Description: Single/becketSheave dia. (in): 3Sheave dia. (mm): 76Length (in): 7 1/8Length (mm): 184W..

$183.95

Harken, 3.00 Single Midrange Block, 1540

Harken, 3.00 Single Midrange Block, 1540

Center pin dia. (in): 5/16Center pin dia. (mm): 8.10Sheave dia. (in): 2 1/2Sheave dia. (mm): 64Width..

$136.95

Harken, 40mm 90 degree Fixed Head Carbo Block, 2659

Harken, 40mm 90 degree Fixed Head Carbo Block, 2659

Description: Fiddle/423 Carbo-Cam/becketSheave dia. (in): 1 9/16Sheave dia. (mm): 40Length (in): 5 1..

$40.95

Harken, 40mm Carbo Block w-Cam Cleat and Becket, 2646

Harken, 40mm Carbo Block w-Cam Cleat and Becket, 2646

Shackle pin dia. (mm): 4Max. line dia. (in): 1/4Max. line dia. (mm): 6Description: Single/swivel/423..

$125.95

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