Discount Marine Source

	Cruising ESP blocks complement our existing blocks in looks and function, but are simpler in design and construction. Sheaves feature sleeve bearings to handle high static loads and are ideal for halyards or limited purchase systems on cruising boats. Available in aluminum or hand-polished stainless steel.
ESP Ball Bearing Blocks

ESP Blocks

Harken, 100mm ESP Footblock, 6093

Regular Price: $205.00
On Sale For: $174.25

Part # HAR-6093

Manufacturer Part # 6093

Length (in): 5 11/16

Length (mm): 144

Weight (oz): 22.6

Weight (g): 642

Max. line dia. (in): 19

Max. line dia. (mm): 7500

Max. working load (lb): 7500

Max. working load (kg): 3402

Breaking load (lb): 15000

Breaking load (kg): 6804

Quantity:

Harken, 57mm ESP Footblock , 6091

Regular Price: $93.05
On Sale For: $79.09

Part # HAR-6091

Manufacturer Part # 6091

Weight (oz): 5.4

Weight (g): 153

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 2500

Max. working load (kg): 1135

Breaking load (lb): 5000

Breaking load (kg): 2272

Fasteners (RH) (in): 5/16

Fasteners (RH) (mm): 8

Quantity:

Harken, 57mm ESP Footblock w/Lockoff, 6077

Regular Price: $130.70
On Sale For: $111.10

Part # HAR-6077

Manufacturer Part # 6077

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 3 7/8

Length (mm): 99

Weight (oz): 8

Weight (g): 226

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 2500

Max. working load (kg): 1135

Breaking load (lb): 5000

Breaking load (kg): 2272

Quantity:

Harken, 57mm ESP Low Load Mastcollar Block, 6095

Regular Price: $58.30
On Sale For: $49.56

Part # HAR-6095

Manufacturer Part # 6095

Breaking load (lb): 3300

Breaking load (kg): 1500

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 4 5/8

Length (mm): 117

Weight (oz): 4

Weight (g): 113

Clevis pin dia. (in): -

Clevis pin dia. (mm): 6

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 1650

Max. working load (kg): 750

Description: 57mm ESP Low Load Mast Collar

Quantity:

Harken, 57mm ESP Mastcollar Block, 6050

Regular Price: $58.95
On Sale For: $50.11

Part # HAR-6050

Manufacturer Part # 6050

Max. lockoff load (lb): -

Max. lockoff load (kg): -

Fasteners (RH) (mm): -

Fasteners (RH) (in): -

Description: Mastcollar block

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 3 11/16

Length (mm): 93.5

Weight (oz): 4.3

Weight (g): 122

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 2100

Max. working load (kg): 850

Breaking load (lb): 4190

Breaking load (kg): 1900

Quantity:

Harken, 57mm ESP Narrow Mastcollar Block (6mm pin), 6096

Regular Price: $56.30
On Sale For: $47.86

Part # HAR-6096

Manufacturer Part # 6096

Description: 57 mm narrow mastcollar block

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 3 1/2

Length (mm): 89

Weight (oz): 3.3

Weight (g): 94

Clevis pin dia. (in): -

Clevis pin dia. (mm): 6

Max. line dia. (in): 3/8

Max. line dia. (mm): 10

Max. working load (lb): 1650

Max. working load (kg): 748

Breaking load (lb): 3300

Breaking load (kg): 1497

Quantity:

Harken, 57mm ESP Narrow Mastcollar Block (8mm pin), 6097

Regular Price: $56.65
On Sale For: $48.15

Part # HAR-6097

Manufacturer Part # 6097

Description: 57 mm narrow mastcollar block

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 3 1/2

Length (mm): 89

Weight (oz): 3.5

Weight (g): 99

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/8

Max. line dia. (mm): 10

Max. working load (lb): 1650

Max. working load (kg): 748

Breaking load (lb): 3300

Breaking load (kg): 1497

Quantity:

Harken, 57mm ESP Padeye Block, 6065

Regular Price: $70.20
On Sale For: $59.67

Part # HAR-6065

Manufacturer Part # 6065

Description: Padeye block

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 3 11/16

Length (mm): 93.5

Weight (oz): 4.5

Weight (g): 128

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 2100

Max. working load (kg): 850

Breaking load (lb): 4190

Breaking load (kg): 1900

Max. lockoff load (lb): -

Max. lockoff load (kg): -

Fasteners (RH) (in): -

Fasteners (RH) (mm): -

Quantity:

Harken, 57mm ESP Swivel Block, 6059

Regular Price: $88.10
On Sale For: $74.89

Part # HAR-6059

Manufacturer Part # 6059

Description: Mastbase/swivel

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 5 1/2

Length (mm): 140

Weight (oz): 7.7

Weight (g): 218

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Max. working load (lb): 2500

Max. working load (kg): 1135

Breaking load (lb): 5000

Breaking load (kg): 2272

Max. lockoff load (lb): 3/8

Max. lockoff load (kg): 10

Quantity:

Harken, 57mm ESP Swivel w/Becket, 6094

Regular Price: $110.10
On Sale For: $93.59

Part # HAR-6094

Manufacturer Part # 6094

Description: 57mm ESP Swivel w/Becket

Max. working load (lb): 2500

Max. working load (kg): 1135

Breaking load (lb): 5000

Breaking load (kg): 2272

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 5/8

Max. line dia. (mm): 16

Weight (oz): 9

Weight (g): 255

Sheave dia. (in): 2 1/4

Sheave dia. (mm): 57

Length (in): 6 11/16

Length (mm): 170

Quantity:

Harken, 75mm ESP Fiddle Block, 6085

Regular Price: $178.85
On Sale For: $152.02

Part # HAR-6085

Manufacturer Part # 6085

Description: Fiddle

Sheave dia. (in): 3/ 1 13/16

Sheave dia. (mm): 75 / 46

Length (in): 8 3/8

Length (mm): 213

Weight (oz): 14.7

Weight (g): 415

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3500

Max. working load (kg): 1587

Breaking load (lb): 7000

Breaking load (kg): 3175

Quantity:

Harken, 75mm ESP Fiddle w/Becket, 6086

Regular Price: $226.00
On Sale For: $192.10

Part # HAR-6086

Manufacturer Part # 6086

Sheave dia. (in): 3 / 1 13/16

Sheave dia. (mm): 75 / 46

Length (in): 9 1/2

Length (mm): 241

Weight (oz): 15.6

Weight (g): 444

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3500

Max. working load (kg): 1587

Breaking load (lb): 7000

Breaking load (kg): 3175

Description: Fiddle/becket

Quantity:

Harken, 75mm ESP Footblock , 6092

Regular Price: $120.85
On Sale For: $102.72

Part # HAR-6092

Manufacturer Part # 6092

D (mm): 1 9/32

D (in): 15

E (mm): 2 31/32

E (in): 75

F (mm): 4 3/8

F (in): 111

C (in): 9/16

C (mm): 14

G (in): -

G (mm): -

Quantity:

Harken, 75mm ESP Footblock w/Lockoff, 6078

Regular Price: $162.35
On Sale For: $138.00

Part # HAR-6078

Manufacturer Part # 6078

B (in): 2 13/32

B (mm): 61

C (in): 2

C (mm): 51

D (in): 9/16

D (mm): 14

E (in): 2 7/8

E (mm): 74

F (in): 4 5/16

F (mm): 110

G (in): -

G (mm): -

Quantity:

Harken, 75mm ESP Mastcollar Block , 6056

Regular Price: $84.95
On Sale For: $72.21

Part # HAR-6056

Manufacturer Part # 6056

Max. lockoff load (kg): -

Fasteners (RH) (in): -

Fasteners (RH) (mm): -

Max. working load (kg): 1361

Breaking load (kg): 6000

Breaking load (lb): 2721

Max. lockoff load (lb): -

Description: Mastcollar block

Sheave dia. (in): 3

Sheave dia. (mm): 75

Length (in): 4 5/8

Length (mm): 117

Weight (oz): 7.8

Weight (g): 221

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3000

Quantity:

Harken, 75mm ESP Narrow Mastcollar Block, 6098

Regular Price: $82.40
On Sale For: $70.04

Part # HAR-6098

Manufacturer Part # 6098

Description: 75 mm narrow mastcollar block

Sheave dia. (in): 3

Sheave dia. (mm): 75

Length (in): 4 7/16

Length (mm): 113

Weight (oz): 6.4

Weight (g): 181

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 1/2

Max. line dia. (mm): 12

Max. working load (lb): 2500

Max. working load (kg): 1134

Breaking load (lb): 5000

Breaking load (kg): 2268

Quantity:

Harken, 75mm ESP Padeye Block , 6057

Regular Price: $101.20
On Sale For: $86.02

Part # HAR-6057

Manufacturer Part # 6057

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3500

Max. working load (kg): 1587

Breaking load (lb): 7000

Breaking load (kg): 3175

Max. lockoff load (lb): -

Max. lockoff load (kg): -

Fasteners (RH) (in): -

Fasteners (RH) (mm): -

Description: Padeye block

Sheave dia. (in): 3

Sheave dia. (mm): 75

Length (in): 4 11/16

Length (mm): 119

Weight (oz): 8.4

Weight (g): 238

Clevis pin dia. (in): 3/8

Clevis pin dia. (mm): 10

Quantity:

Harken, 75mm ESP Swivel Block, 6058

Regular Price: $100.45
On Sale For: $85.38

Part # HAR-6058

Manufacturer Part # 6058

Breaking load (kg): 3175

Description: Mastbase/swivel

Sheave dia. (in): 3

Sheave dia. (mm): 75

Length (in): 6 1/4

Length (mm): 159

Weight (oz): 12

Weight (g): 340

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3500

Max. working load (kg): 1587

Breaking load (lb): 7000

Quantity:

Harken, 75mm ESP Swivel w/Becket, 6084

Regular Price: $130.70
On Sale For: $111.10

Part # HAR-6084

Manufacturer Part # 6084

Description: Single/swivel/becket

Sheave dia. (in): 3

Sheave dia. (mm): 75

Length (in): 7 1/4

Length (mm): 184

Weight (oz): 13

Weight (g): 369

Clevis pin dia. (in): 5/16

Clevis pin dia. (mm): 8

Max. line dia. (in): 3/4

Max. line dia. (mm): 19

Max. working load (lb): 3500

Max. working load (kg): 1587

Breaking load (lb): 7000

Breaking load (kg): 3175

Quantity: