58
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 perma-
nent 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 tempo-
rarily 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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