63
3004
C8322
3002
C8624
3003
1989
3122 
1987
A
B
© Skip Mattos
Flip-Flop Blocks
Low-profile Flip-Flop blocks are lightweight and can be used 
for various leads on your boat including halyard, mainsheet, 
and spinnaker sheet leads.
The Flip-Flop block has aluminum hardcoat-anodized sideplates 
and features Hard Lube-anodized aluminum sheaves for strength 
and corrosion resistance.
High-load Flip-Flop blocks pivot around the line axis to keep line close 
to the deck. Hinged construction allows variable leads. Lockoff 
provides a temporary stop to free up winches.
Over-the-Top Blocks
Over-the-top blocks lead lines aft over cabin houses, 
coamings, and splashguards. They feature high-load 
sheaves and come in single, double, and 
triple configurations. 
Dimensions
Part
No.
Description
Sheave
Ø
Width
Length
Height
Weight
Max line
Ø
Maximum
working load
Breaking
load
in
mm
in
mm
in
mm
in
mm
oz
g
in
mm
lb
kg
lb
kg
 1987  Flip-Flop 
 3 
 76 
 2 7/8 
 72 
 6 
 152 
 4 
 100 
 17.37 
 493 
 1/2 
 12 
 5000 
 2273  10000  4545 
 1989  Flip-Flop/lockoff 
 3 
 76 
 2 7/8 
 72 
 6 
 152 
 4 
 100 
 21.1 
 598 
 1/2 
 12 
 5000 
 2273  10000  4545 
 3122  Flip-Flop 
 2 1/4 
 57 
 2 1/4 
 57 
 4 3/8 
 111 
 2 7/8 
 73 
 9 
 255 
 3/8 
 10 
 2500 
 1136 
 5000 
 2273 
Part
No.
Fasteners (SH)
A
B
in
mm
in
mm
in
mm
 1987 /1989
 5/16 
 8 
 4 15/16 
 125 
 1 15/16 
 50 
 3122 /3194
 1/4 
 6 
 3 11/16 
 93.6 
 1 9/16 
 39.7 
 SH cap screw fasteners.
Part
No.
Description
Sheave
Ø
Width
Length
Height
Weight
Max line
Ø
Maximum
working load
Breaking
load
Fasteners
required
in
mm
in
mm
in
mm
in
mm
oz
g
in
mm
lb
kg
lb
kg
 3002  Single over-the-top* 
 2 1/4 
 57 
 1 3/8 
 35 
 3 1/4 
 83 
 3 1/4 
 83 
 6.4 
 181 
 3/8 
 10 
 2500 
 1136 
 5000 
 2272 
 2 
 3003  Double over-the-top* 
 2 1/4 
 57 
 2 7/16 
 62 
 3 1/4 
 83 
 3 1/4 
 83 
 12.2 
 346 
 3/8 
 10 
 2500 
 1136 
 5000 
 2272 
 4 
 3004  Triple over-the-top* 
 2 1/4 
 57 
 3 1/2 
 89 
 3 1/4 
 83 
 3 1/4 
 83 
 18.1 
 513 
 3/8 
 10 
 2500 
 1136 
 5000 
 2272 
 6 
 C8322  Single over-the-top** 
 1 3/4 
 45 
 1 7/16 
 36 
 3 1/16 
 78 
 3 7/32 
 82 
 5.6 
 159 
 1/2 
 12 
 2500 
 1136 
 5000 
 2272 
 2 
 C8624  Single over-the-top** 
 2 15/16 
 75 
 1 11/16 
 43 
 4 
 101 
 4 
 101 
 18.5 
 526 
 9/16 
 14 
 5000 
 2272  10000  4536 
 3 
 *6 mm (1/4") FH.     **Contact Harken to request quote and lead time.

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