Harken 57mm Flip-Flop Small Boat Block
Small Boat Flip-Flop blocks pivot around the line axis to keep the line close to the deck. Hinged construction allows for various lead angles. Ratchamatic block versions roll freely in both directions under low loads and automatically engage a ratchet mechanism as loads increase, giving sailors a holding power of up to 15:1. The ratchet engagement can be adjusted to a higher or lower load depending on the sailors strength, sailing style and system usage. Sheave: 2-1/4". Length: 4-5/16". Width: 2-5/8". Height: 4-3/16". Weight: 12 oz. Maximum line: 3/8". Maximum working load: 300 lb. Breaking load: 600 lb. Note: Maximum working loads and breaking loads for blocks based on cam strengths.
Item / Price
Stock Type
Inventory On Hand
05/19 @ 11:56 AM
Product Code
Order Quantity
CUSTOM: 57mm-flipflop-small-boat-block
Blocks: 56-68mm
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Barton Size 4 Plain Bearing Block 54mm
$53.17 USD -
Blueshark #2310 57mm Single Swivel Aluminum Sailing Block
$70.27 USD -
Blueshark #2316 57mm Aluminum Single Swivel Fiddle Block
$99.71 USD -
Blueshark #2320 57mm Fiddle with Becket & Camcleat
$119.65 USD -
Garhauer 2-5/8" Sheave Snatch Block
$140.54 USD -
Garhauer #30-19UAB Black Single Stand Up Deck Block
$68.37 USD -
Garhauer #30-LS-US Catalina 320 Mast Collar Block
$82.61 USD -
Garhauer #40-06UAB Black Fiddle with Becket & Cam
$142.44 USD -
Garhauer 2-5/8" Fiddle Swivel Block with Becket
$133.89 USD -
Garhauer Black Alum Block 67mm
$65.52 USD -
Garhauer Cheek Block (67mm)
from $59.82 USD -
Garhauer Fiddle (67mm)
from $63.62 USD -
Garhauer Grey Alum Block 67mm
from $63.62 USD -
Garhauer Stainless Steel Block (67mm)
from $65.52 USD -
Harken 57 mm Black Magic Air Blocks
from $231.71 USD -
Harken 57mm Aluminum ESP Block
$128.20 USD -
Harken 57mm Aluminum ESP Footblock
from $112.05 USD -
Harken 57mm Aluminum HL Footblock
from $250.70 USD -
Harken 57mm Flip-Flop Small Boat Block
from $223.16 USD -
Harken 57mm Over-The-Top Block
from $264.95 USD -
Harken 57mm Teardrop Mastbase ESP
from $90.21 USD -
Harken 57mm Zircon Block
from $79.76 USD -
Harken 60mm Element Block
from $76.91 USD -
Harken #047 2-1/4" Thru Deck Block
$80.71 USD -
Harken #1204 60mm Protexit Single Block
$166.18 USD -
Harken #1968 57mm Double Foot with Lock
$397.90 USD -
Harken #1988 57 mm Aluminum Mastbase Block
$261.15 USD -
Harken #2178 57 mm Double Ratchet Block with Swivel
$232.66 USD -
Harken #3214 57mm Aluminum Loop Block
$284.89 USD -
Harken #3224 57mm Runner Block
$387.45 USD -
Harken #6068 57mm Stainless ESP Mastbase Block
$253.55 USD -
Harken 57mm Airblock
$321.93 USD -
Harken 57mm Carbo Block
from $56.97 USD -
Harken 57mm Classic Blocks
from $68.37 USD -
Harken 57mm T2 Loop Block
$67.42 USD -
Harken 57mm T2 Soft-Attach
from $60.77 USD -
Harken Carbo Ratchet (57mm)
from $95.91 USD -
Harken Hexaratchets (57mm)
$104.45 USD -
Harken Snatch Block (64mm)
$434.94 USD -
Harken Upright Blocks (57mm)
$92.11 USD -
Harken Hexaratchet (76mm)
$115.85 USD -
Harken Power3 57mm Ratchet Blocks
from $135.79 USD -
Harken Power3 57mm Soft-Attach Ratche
from $97.81 USD -
Harken Power3 57mm Switchable Ratchet
from $95.91 USD -
Lewmar 60mm HTX Blocks
from $122.50 USD -
Lewmar 60mm Synchro Blocks
from $54.12 USD -
Lewmar VF 60mm Blocks
$167.13 USD -
Ronstan Series 60 Block
from $137.69 USD -
Schaefer #704-06 Single Swivel
$259.25 USD -
Schaefer #704-60 Halyard Block
$150.99 USD -
Schaefer #706-05 60mm BB Single
$173.78 USD -
Schaefer 704-15 Single Becket
$215.57 USD -
Schaefer 705-28 Double Cheek
$351.37 USD -
Selden PBB 60 Plain Bearing Block
$79.76 USD -
Spinlock Hardware Spinnaker Jammer (63mm)
$186.13 USD