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, 1

Harken, 1" Wire Forkhead Block w/Bkt, 466

Description: Single/becketSheave dia. (in): 1Sheave dia. (mm): 25Weight (oz): 1.02Weight (g): 29Max...

$33.84

Harken, 1.00 Single Wire Block w/Becket, 312

Harken, 1.00 Single Wire Block w/Becket, 312

Description: Single/becketSheave dia. (in): 1Sheave dia. (mm): 25Weight (oz): 1.25Weight (g): 35Max...

$37.58

Harken, 1.00 Single Wire Block, 300

Harken, 1.00 Single Wire Block, 300

Description: SingleSheave dia. (in): 1Sheave dia. (mm): 25Weight (oz): 1Weight (g): 28Max. wire dia...

$32.38

Harken, 1.00 Wire Cheek Block w/Fasteners, 301

Harken, 1.00 Wire Cheek Block w/Fasteners, 301

Description: Cheek+ *Sheave dia. (in): 1Sheave dia. (mm): 25Weight (oz): 1.25Weight (g): 35Max. wire..

$34.10

Harken, 1.00 Wire Sheave, 303

Harken, 1.00 Wire Sheave, 303

Line (in): 5/32Line (mm): 4Center pin dia. (in): 3/16Center pin dia. (mm): 4.75Weight (g): 7Max. wir..

$21.12

Harken, 1.00 Wire Thru Deck Block, 302

Harken, 1.00 Wire Thru Deck Block, 302

Max. working load (kg): 454Breaking load (lb): 2000Breaking load (kg): 907Description: Thru-deck*She..

$41.01

Harken, 1.50 Ferrule Head Wire Block, 320

Harken, 1.50 Ferrule Head Wire Block, 320

Description: Ferrule headSheave dia. (in): 1 1/2Sheave dia. (mm): 38Weight (oz): 3Weight (g): 85Max...

$60.28

Harken, 1.50 Single Wire Block w/Becket, 313

Harken, 1.50 Single Wire Block w/Becket, 313

Breaking load (kg): 1361Description: Single/becketSheave dia. (in): 1 1/2Sheave dia. (mm): 38Weight ..

$56.98

Harken, 1.50 Single Wire Block, 304

Harken, 1.50 Single Wire Block, 304

Description: SingleSheave dia. (in): 1 1/2Sheave dia. (mm): 38Weight (oz): 2.75Weight (g): 78Max. wi..

$53.24

Harken, 1.50 Split Backstay Plate, 321

Harken, 1.50 Split Backstay Plate, 321

Description: Small split backstay plate for 304Sheave dia. (in): -Sheave dia. (mm): -Weight (oz): 1W..

$23.06

Harken, 1.50 Wire Cheek Block w/Fasteners, 305

Harken, 1.50 Wire Cheek Block w/Fasteners, 305

Description: Cheek+ **Sheave dia. (in): 1 1/2Sheave dia. (mm): 38Weight (oz): 3.25Weight (g): 92Max...

$54.34

Harken, 1.50 Wire Sheave, 307

Harken, 1.50 Wire Sheave, 307

Line (in): 3/16Line (mm): 5Center pin dia. (in): 1/4Center pin dia. (mm): 6.27Description: WireSheav..

$33.04

Harken, 1.50 Wire Thru Deck Block, 306

Harken, 1.50 Wire Thru Deck Block, 306

Description: Thru-deck*Sheave dia. (in): 1 1/2Sheave dia. (mm): 38Weight (oz): 3.25Weight (g): 92Max..

$58.08

Harken, 1.75 Dinghy Thru Deck Block w/Coverplate, 046

Harken, 1.75 Dinghy Thru Deck Block w/Coverplate, 046

Cutout (in): 1 1/16 x 2 1/16Cutout (mm): 27 x 68Hole spacing (in): 1 1/2 and 2Hole spacing (mm): 38 ..

$46.24

Harken, 100mm ESP Footblock, 6093

Harken, 100mm ESP Footblock, 6093

Length (in): 5 11/16Length (mm): 144Weight (oz): 22.6Weight (g): 642Max. line dia. (in): 19Max. line..

$202.84

Harken, 16 mm Air Block w/Becket, 405

Harken, 16 mm Air Block w/Becket, 405

Description: Single/becketSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 1/2Length (mm): 38..

$14.83

Harken, 16 mm Air Block with O Ring, 404

Harken, 16 mm Air Block with O Ring, 404

Description: SingleSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 1/8Length (mm): 29Weight ..

$12.98

Harken, 16 mm Double Air Block w/Becket , 407

Harken, 16 mm Double Air Block w/Becket , 407

Description: Double/becketSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 2 1/8Length (mm): 54..

$29.48

Harken, 16 mm Double Air Block, 406

Harken, 16 mm Double Air Block, 406

Description: DoubleSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 11/16Length (mm): 43Weigh..

$26.97

Harken, 16 mm Triple Air Block w/Becket , 409

Harken, 16 mm Triple Air Block w/Becket , 409

Description: Triple/becketSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 2 1/4Length (mm): 57..

$40.08

Harken, 16 mm Triple Air Block, 408

Harken, 16 mm Triple Air Block, 408

Weight (oz): 1.44Weight (g): 41Max. line dia. (in): 7/32Max. line dia. (mm): 5Max. working load (lb)..

$38.06

Harken, 16mm Anti-Capsize Block, 442

Harken, 16mm Anti-Capsize Block, 442

Description: Block/eyestrap assemblySheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 3/8Lengt..

$19.49

Harken, 16mm Cheek Air Block, 416

Harken, 16mm Cheek Air Block, 416

Description: Cheek*Sheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 13/16Length (mm): 46Weigh..

$15.00

Harken, 16mm Exit Block, 421

Harken, 16mm Exit Block, 421

Description: Thru-deckSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 2 3/8Length (mm): 60Weig..

$36.08

Harken, 16mm Eyestrap, 445

Harken, 16mm Eyestrap, 445

H (mm): -Fits T-track (mm): -Fasteners (in): #8 RHFasteners (mm): 4..

$1.36

Harken, 16mm Flip Flop Block, 437

Harken, 16mm Flip Flop Block, 437

Description: Flip-flop blockSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 5/16Length (mm):..

$34.19

Harken, 16mm Forkhead Block, 376

Harken, 16mm Forkhead Block, 376

Description: ForkheadSheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 1/8Length (mm): 29Weigh..

$18.39

Harken, 16mm Hook-in/Sprit Block, 391

Harken, 16mm Hook-in/Sprit Block, 391

Weight (g): 13Max. line dia. (in): 7/32Max. line dia. (mm): 5Max. working load (lb): 250Max. working..

$25.92

Harken, 16mm In-Line Exit Block, 368

Harken, 16mm In-Line Exit Block, 368

Description: In-line exit*Sheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 3Length (mm): 76Weig..

$49.54

Harken, 16mm Narrow Block, 467

Harken, 16mm Narrow Block, 467

Max. working load (lb): 250Max. working load (kg): 113Sheave dia. (in): 5/8Sheave dia. (mm): 16Max. ..

$14.78

Harken, 16mm Pivoting Cheek Air Block, 432

Harken, 16mm Pivoting Cheek Air Block, 432

Max. line dia. (mm): 5Max. working load (lb): 250Max. working load (kg): 113Breaking load (lb): 750B..

$16.19

Harken, 16mm Sheave , 415

Harken, 16mm Sheave , 415

Line (in): 3/16Line (mm): 5Center pin dia. (in): 3/16Center pin dia. (mm): 4.75Max. working load (kg..

$9.06

Harken, 16mm Swivel Air Block, 417

Harken, 16mm Swivel Air Block, 417

Description: Single/swivel**Sheave dia. (in): 5/8Sheave dia. (mm): 16Length (in): 1 13/16Length (mm)..

$23.28

Harken, 2.00 Single Wire Block w/Becket, 314

Harken, 2.00 Single Wire Block w/Becket, 314

Max. working load (kg): 907Breaking load (lb): 4000Breaking load (kg): 1814Description: Single/becke..

$84.83

Harken, 2.00 Single Wire Block, 308

Harken, 2.00 Single Wire Block, 308

Breaking load (lb): 4000Max. working load (kg): 907Description: SingleSheave dia. (in): 2Sheave dia...

$77.70

Harken, 2.00 Wire Cheek Block w/Fasteners, 309

Harken, 2.00 Wire Cheek Block w/Fasteners, 309

Description: Cheek+ ***Sheave dia. (in): 2Sheave dia. (mm): 51Weight (oz): 6Weight (g): 170Max. wire..

$77.70

Harken, 2.00 Wire Sheave, 311

Harken, 2.00 Wire Sheave, 311

Description: WireSheave dia. (in): 2Sheave dia. (mm): 51Width (in): 13/32Width (mm): 10Weight (oz): ..

$52.49

Harken, 2.00 Wire Thru Deck Block, 310

Harken, 2.00 Wire Thru Deck Block, 310

Sheave dia. (mm): 51Max. wire dia. (in): 3/16Max. wire dia. (mm): 5Max. line dia. (in): 1/4Max. line..

$86.33

Harken, 2.25 Deck Sheave, 727

Harken, 2.25 Deck Sheave, 727

Max. line dia. (in): 1/2Max. line dia. (mm): 12Max. wire dia. (in): 5/16Max. wire dia. (mm): 8Max. w..

$115.37

Harken, 2.25 Little Hexa-Cat Base w/Adjustable Cam Cleat, 193

Harken, 2.25 Little Hexa-Cat Base w/Adjustable Cam Cleat, 193

Description: Little Hexa-Cat baseSheave dia. (in): 2 1/4Sheave dia. (mm): 57Length (in): 5 3/4Length..

$186.30

Harken, 2.25 Single Block , 001

Harken, 2.25 Single Block , 001

Description: SingleSheave dia. (in): 2 1/4Sheave dia. (mm): 57Length (in): 4 1/4Length (mm): 108Weig..

$45.67

Harken, 2.25 Thru Deck Block w/Coverplate, 047

Harken, 2.25 Thru Deck Block w/Coverplate, 047

Description: Thru-deck*Sheave dia. (in): 2 1/4Sheave dia. (mm): 57Length (in): 3 1/2Length (mm): 89W..

$54.34

Harken, 2.25 Upright Lead Block, 206

Harken, 2.25 Upright Lead Block, 206

Description: Upright lead**Sheave dia. (in): 2 1/4Sheave dia. (mm): 57Length (in): 3 1/4Length (mm):..

$61.73

Harken, 29mm 90 degree Fixed Head Carbo Block, 352

Harken, 29mm 90 degree Fixed Head Carbo Block, 352

Description: 29mm 90 deg Fixed Head Carbo BlockSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length - ..

$16.98

Harken, 29mm Carbo Cheek Block, 350

Harken, 29mm Carbo Cheek Block, 350

Description: CheekSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 1/8Length (mm): 53Weight..

$13.51

Harken, 29mm Carbo Clew Block Assembly, 371

Harken, 29mm Carbo Clew Block Assembly, 371

Weight w/shackle (oz): 1.8Weight w/shackle (g): 51Length (in): 4 7/8Length (mm): 124Max. line dia. (..

$26.80

Harken, 29mm Carbo Double Fixed Block, 381

Harken, 29mm Carbo Double Fixed Block, 381

Sheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 1/8Length (mm): 54Weight w/shackle (oz): 1..

$32.78

Harken, 29mm Carbo Traveler Block, 353

Harken, 29mm Carbo Traveler Block, 353

Description: 29mm Carbo Traveler BlockSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 3 5/8L..

$27.10

Harken, 29mm Double Swivel Carbo Block w/Becket, 343

Harken, 29mm Double Swivel Carbo Block w/Becket, 343

Description: Double / swivel / becketSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 3 3/8Le..

$41.93

Harken, 29mm Double Swivel Carbo Block, 342

Harken, 29mm Double Swivel Carbo Block, 342

Description: Double / swivelSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 7/8Length (mm)..

$38.68

Harken, 29mm Outboard stanchion lead block assembly, 7403

Harken, 29mm Outboard stanchion lead block assembly, 7403

Description: 29 mm Outboard stanchion lead block assembly..

$37.60

Harken, 29mm Single Fixed Carbo Block, 348

Harken, 29mm Single Fixed Carbo Block, 348

Description: Single / fixedSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 1 15/16Length (mm..

$12.58

Harken, 29mm Single Fixed Standup Carbo Block, 349

Harken, 29mm Single Fixed Standup Carbo Block, 349

Description: Stand-up / fixedSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 3/16Length (m..

$19.62

Harken, 29mm Single Swivel Carbo Block w/Becket, 341

Harken, 29mm Single Swivel Carbo Block w/Becket, 341

Description: Single / swivel / becketSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 3 1/16L..

$24.55

Harken, 29mm Single Swivel Carbo Block, 340

Harken, 29mm Single Swivel Carbo Block, 340

Description: Single / swivelSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 5/8Length (mm)..

$21.30

Harken, 29mm Triple Carbo Block w/Cam Cleat & Becket, 347

Harken, 29mm Triple Carbo Block w/Cam Cleat & Becket, 347

Description: Triple / cam / becketSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 3 3/8Lengt..

$92.09

Harken, 29mm Triple Carbo Block w/Cam Cleat, 346

Harken, 29mm Triple Carbo Block w/Cam Cleat, 346

Description: triple / camSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 7/8Length (mm): 7..

$88.84

Harken, 29mm Triple Swivel Carbo  Block w/Becket, 345

Harken, 29mm Triple Swivel Carbo Block w/Becket, 345

Description: Triple / swivel / becketSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 3 3/8Le..

$54.03

Harken, 29mm Triple Swivel Carbo Swivel Block, 344

Harken, 29mm Triple Swivel Carbo Swivel Block, 344

Description: Triple / swivelSheave dia. (in): 1 1/8Sheave dia. (mm): 29Length (in): 2 7/8Length (mm)..

$50.78

Harken, 3.00 Hexa-Cat Base w/Adjustable Cam Cleat, 170

Harken, 3.00 Hexa-Cat Base w/Adjustable Cam Cleat, 170

Description: Hexa-Cat baseSheave dia. (in): 3Sheave dia. (mm): 76Length (in): 7 1/4Length (mm): 184W..

$230.56

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