57
3223
3240
3253
3220
3234
3249
3257
3263
3222
3235
3250
3258
E
F
C
G
A
B
D
3236
3237
Teardrop Blocks
Teardrop blocks are ideal as masthead leads and in other applications where 
limited articulation or direct attachment is desired. When attached to a compatible 
padeye, teardrop blocks will not hit the deck when lines are slack, but allow 
enough movement to ensure fairleads when jumping halyards. They are often 
used on permanent backstays of fractionally rigged boats where the backstay 
can be spliced directly to the head of the block.
About Black Magic Air blocks: see feature pages at beginning of this section.
Footblocks
Use footblocks to redirect lines on 
the deck. Footblocks with lockoffs 
temporarily secure sheets.
Either metric or imperial flathead 
fasteners may be used for mounting 
and are not exposed.
About Black Magic Air blocks: see feature 
pages at beginning of this section.
*Lockoffs are intended to hold lines temporarily and should not be used in place of line stoppers or clutches.
Part
No.
Description
Sheave
Ø
Length
Weight
Clevis pin
Ø
Max line
Ø
Maximum
working load
Breaking
load
Use
padeye
in
mm
in
mm
oz
g
in
mm
in
mm
lb
kg
lb
kg
 57 mm 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 3223 
 Padeye/high-load 
 2 1/4 
 57 
 3 3/8 
 86 
 3.92 
 111 
 5/16 
 8 
 3/8 
 10 
 2500 
 1134 
 5000 
 2268 
 627 
 75 mm 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 3240 
 Padeye 
 2 15/16 
 75 
 4 7/16 
 113 
 8.72 
 247 
 3/8 
 10 
 9/16 
 14 
 5000 
 2268 
 10000 
 4536 
 648/689 
 100 mm 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 3253 
 Padeye 
 3 15/16 
 100 
 5 13/16 
 148 
 16 
 454 
 1/2 
 12.7 
 5/8 
 16 
 7500 
 3402 
 15000 
 6804 
 
Part
No.
A
B
C
D
E
F
G
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
in
mm
 3220 /3221/3222
 3/8 
 9.5 
 7/8 
 22.5 
 2 1/32 
 51.5 
 5/8 
 16 
 2 5/16 
 59 
 3 5/16 
 84 
 1/2 
 13 
 3234 /3235/3236/3237
 15/32 
 11.5 
 1 1/8 
 28.5 
 2 3/4 
 70.5 
 13/16 
 21 
 3 
 77 
 4 5/16 
 110 
 21/32 
 17 
 3249 /3250
 9/16 
 14.5 
 1 15/32 
 37.5 
 3 21/32 
 92.5 
 1 3/32 
 28 
 3 15/16 
 100 
 5 5/8 
 143 
 29/32 
 23 
 3257 /3258
 21/32 
 17 
 1 25/32 
 45 
 4 7/16 
 113 
 1 11/32 
 34.5 
 5 1/32 
 127.5 
 6 29/32 
 176 
 1 3/32 
 28 
 3263 
 13/16 
 20.5 
 2 3/32 
 53.5 
 5 3/32 
 129 
 1 5/8 
 41 
 6 1/16 
 154 
 8 1/32 
 204 
 1 5/16 
 33 
Part
No.
Description
Sheave
Ø
Length
Height
Weight
Max line
Ø
Maximum
working load
Breaking
load
Fasteners
(FH)
in
mm
in
mm
in
mm
oz
g
in
mm
lb
kg
lb
kg
pul
mm
 57 mm 
 3220  Single/high-load 
 2 1/4 
 57 
 3 5/16 
 84 
 1 
 25 
 4.29 
 122 
 7/16 
 12 
 2500 
 1134 
 5000 
 2268 
 4 x 1/4 
 4 x 6 
 3222  Double/high-load 
 2 1/4 
 57 
 3 5/16 
 84 
 1 13/16 
 46 
 7.6 
 215 
 7/16 
 12 
 1655 
 750 
 3310 
 1500 
 4 x 1/4 
 4 x 6 
 75 mm 
 3234  Single 
 2 15/16 
 75 
 4 3/8 
 111 
 1 1/4 
 32 
 9.76 
 277 
 9/16 
 14 
 5250 
 2380 
 10500 
 4762  4 x 5/16  4 x 8 
 3235  Double 
 2 15/16 
 75 
 4 3/8 
 111 
 2 1/4 
 57 
 17.28 
 490 
 9/16 
 14 
 3465 
 1572 
 6930 
 3143  4 x 5/16  4 x 8 
 3236  Single/lockoff* 
 2 15/16 
 75 
 4 3/8 
 111 
 1 1/4 
 32 
 11.28 
 320 
 9/16 
 14 
 5250 
 2380 
 10500 
 4762  4 x 5/16  4 x 8 
 3237  Double/lockoff* 
 2 15/16 
 75 
 4 3/8 
 111 
 2 1/4 
 57 
 20.24 
 574 
 9/16 
 14 
 3465 
 1572 
 6930 
 3143  4 x 5/16  4 x 8 
 100 mm 
 3249  Single 
 3 15/16 
 100 
 5 5/8 
 143 
 1 5/16 
 33 
 19.57 
 555 
 5/8 
 16 
 7500 
 3402 
 15000 
 6804 
 4 x 3/8  4 x 10 
 3250  Double 
 3 15/16 
 100 
 5 5/8 
 143 
 2 7/16 
 62 
 34.1 
 967 
 5/8 
 16 
 4950 
 2250 
 9900 
 4500 
 4 x 3/8  4 x 10 
 125 mm 
 3257  Single 
 4 15/16 
 125 
 6 15/16 
 176 
 1 11/16 
 43 
 34.29 
 972 
 3/4 
 19 
 11000 
 4990 
 22000 
 9979 
 4 x 1/2  4 x 12 
 3258  Double 
 4 15/16 
 125 
 6 15/16 
 176 
 2 13/16  71.5 
 60.35 
 1711 
 3/4 
 19 
 7260 
 3292 
 14520 
 6585 
 4 x 1/2  4 x 12 
 150 mm 
 3263  Single 
 5 15/16 
 150 
 8 1/16 
 205 
 1 7/8 
 48 
 58.58 
 1661 
 1 
 25 
 15000 
 6804 
 30000  13608  4 x 5/8  4 x 16 
Dimensions

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