Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications
Big Boat blocks > Stainless Steel ESP
Add dazzle to your boat with elegant stainless steel blocks. Sideplates are polished to a high luster to reflect your boat's beauty, whether it's of classic wood, or a modern cruiser.ESP sheaves feature axle bearings to handle high, static loads and sideload balls so sheaves spin freely when loads are released. They are perfect for halyards or limited purchase systems on cruising boats. ESP blocks are easy to install. Footblocks and deck organizers can be double stacked.
Teardrop blocks keep lines close to the deck and are used for mast collars with integral swivel posts. Perforated mast collars, or mastbase situations where the lead may change, require swivel blocks. Footblocks are available with lockoffs to temporarily secure sheets. A single block works for either port or starboard applications by flipping it over.
Use ESP swivel and fiddle blocks in winch-driven purchases of 4:1 or less. Perfect for vangs or mainsheet systems on cruising boats from 35 to 45' (10 to 14 m).
6068 6072 |
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 6069 6073 |
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 6070 6074 |
 6075 6071 |
| Part No. | Description | Sheave |
Length | Weight | Clevis pin |
Max line |
Safe working load | Breaking strength | Max lockoff load | Fasteners (RH) | |||||||||
| in | mm | in | mm | oz | g | in | mm | in | mm | Ib | kg | Ib | kg | Ib | kg | in | mm | ||
| 6068 | Single/swivel | 21/4 | 57 | 51/2 | 140 | 11 | 312 | 5/16 | 8 | 5/8 | 16 | 2500 | 1135 | 5000 | 2272 | | | | |
| 6069 | Mastcollar block | 21/4 | 57 | 311/16 | 93.5 | 7 | 198 | 5/16 | 8 | 5/8 | 16 | 2500 | 1135 | 5000 | 2272 | | | | |
| 6070 | Single foot/lockoff** | 21/4 | 57 | 33/4 | 132 | 9 | 255 | | | 5/8 | 16 | 2500 | 1135 | 5000 | 2272 | 650 | 295 | 3/8 | 10 |
| 6071 | Deck organizer/3-sheave | 21/4 | 57 | 915/16 | 252 | 21 | 595 | | | 5/8 | 16 | 6000 | 2721 | 12000 | 5442 | | | 3/8 | 10 |
| 6072 | Single/swivel | 3 | 75 | 61/4 | 159 | 19 | 539 | 5/16 | 8 | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | | | | |
| 6073 | Mastcollar block | 3 | 75 | 45/8 | 117 | 16 | 454 | 5/16 | 8 | 3/4 | 19 | 3000 | 1361 | 6000 | 2721 | | | | |
| 6074 | Single foot/lockoff** | 3 | 75 | 43/8 | 111 | 17 | 482 | | | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | 750 | 340 | 3/8 | 10 |
| 6075 | Deck organizer/3-sheave | 11/2 | 40 | 711/16 | 179 | 10 | 284 | | | 1/2 | 12 | 3000 | 1361 | 6000 | 2721 | | | 5/16 | 8 |
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* - Lockoffs are intended to hold lines temporarily and should not be used in place of line stoppers or clutches
± - If double stacked, upper block is two-thirds of listed SWL and breaking strength
 6076 6079 |
 6080 |
 6081 |
 6087 |
| Part No. | Description | Sheave |
Length | Weight | Clevis pin |
Max line |
Safe working load | Breaking strength | Fasteners (RH) | ||||||||
| in | mm | in | mm | oz | g | in | mm | in | mm | Ib | kg | Ib | kg | in | mm | ||
| 6076 | Footblock ** ± | 21/4 | 57 | 33/4 | 95 | 7 | 198 | | | 5/8 | 16 | 2500 | 1135 | 5000 | 2272 | 3/8 | 10 |
| 6079 | Footblock ** ± | 3 | 75 | 41/2 | 114 | 16 | 454 | | | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | 3/8 | 10 |
| 6080 | Fiddle | 3 / 113/16 | 75/46 | 83/8 | 213 | 24 | 680 | 5/16 | 8 | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | | |
| 6081 | Fiddle/becket | 3 / 113/16 | 75/46 | 91/2 | 241 | 26.25 | 744 | 5/16 | 8 | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | | |
| 6087 | Single/swivel/becket | 3 | 75 | 71/4 | 184 | 21.25 | 602 | 5/16 | 8 | 3/4 | 19 | 3500 | 1587 | 7000 | 3175 | | |
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** - Refer to this page for 6076 / 6079 hole spacing
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± - If double stacked, upper block is two-thirds of listed SWL and breaking strength
Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications