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- Crosby 'P303B' Steel Shell Manila Rope Pulley Block, Optional No. of Sheaves (1-3), WLL Range from 500kg to 3180kg

Crosby 'P303B' Steel Shell Manila Rope Pulley Block, Optional No. of Sheaves (1-3), WLL Range from 500kg to 3180kg
Western Steel Shell Blocks for Manila Blocks.
Western P-303-B / SSMB-2540




Manilla block with Laser cut side plates. Uses grade 5 bolts secured with lock washers and staked nuts. Bronze bushed sheaves with larger bearing diameter ensure an extended block life. New style hanger for fitting attachment.
Imperial Table
Block Size (in.) |
Fitting | Single Sheave | Double Sheave | Triple Sheave |
301 B* Stock No. |
302 B* Stock No. |
303 B* Stock No. |
||
4 | HS (Latch Hook) | 680971 | 681373 | 681774 |
6 | HS (Latch Hook) | 680999 | 681391 | 681792 |
8 | HS (Latch Hook) | 681015 | 681417 | 681818 |
4 | N (Swivel Hook Latch) | 682639 | 683031 | 683433 |
6 | N (Swivel Hook Latch) | 682675 | 683077 | 683479 |
8 | N (Swivel Hook Latch) | 682719 | 683111 | 683512 |
4 | P (Screw Pin Anchor) | 691031 | 692637 | 694234 |
6 | P (Screw Pin Anchor) | 691077 | 692673 | 694270 |
8 | P (Screw Pin Anchor) | 691111 | 692717 | 694314 |
Metric Table
Block Size (in.) | Fitting | Single Sheave 301 B* Stock No. | Double Sheave 302 B* Stock No. | Triple Sheave 303 B* Stock No. |
4 | HS (Latch Hook) | 680971 | 681373 | 681774 |
6 | HS (Latch Hook) | 680999 | 681391 | 681792 |
8 | HS (Latch Hook) | 681015 | 681417 | 681818 |
4 | N (Swivel Hook Latch) | 682639 | 683031 | 683433 |
6 | N (Swivel Hook Latch) | 682675 | 683077 | 683479 |
8 | N (Swivel Hook Latch) | 682 719 - | 683111 | - |
6 | P (Screw Pin Anchor) | 691 077 - | 692673 | 694270 |
8 | P (Screw Pin Anchor) | 691111 | 692717 | 694314 |
*Bearing Code: B - Self Lubricating Bronze Bushed
Imperial Specifications
Block Size (in.) |
Sheave Size (in.) |
Manila Rope Size (in.) |
Working Load Limit (lbs.)* |
Weight Each (lbs.) |
|||||
Outside Dia. |
Rim Thickness |
Single | Double | Triple | Single | Double | Triple | ||
4 | 2.25 | .63 | 1/2 | 1100 | 1600 | 2200 | 2.25 | 3.75 | 5.00 |
6 | 3.50 | 1.00 | 3/4 | 2000 | 3300 | 4000 | 5.50 | 9.25 | 12.50 |
8 | 4.75 | 1.13 | 1 | 3300 | 5100 | 7000 | 10.00 | 16.50 | 22.00 |
Metric Specifications
Block Size (in.) | Sheave Size (mm) | Manila Rope Size (mm) | Working Load Limit (t)* | Weight Each (kg.) | ||||||
Outside Dia. | Rim Thickness | |||||||||
Single | Double | Triple | Single | Double | Triple | |||||
4 | 57.2 | 16.0 | 13 | .50 | .73 | 1.00 | 1.02 | 1.70 | 2.27 | |
6 | 89.0 | 25.4 | 19 | .91 | 1.50 | 1.81 | 2.49 | 4.20 | 5.67 | |
8 | 121 | 28.7 | 26 | 1.50 | 2.31 | 3.18 | 4.54 | 7.48 | 9.98 |
*Ultimate Load is 3.5 times the Working Load Limit.
Manilla block with Laser cut side plates. Uses grade 5 bolts secured with lock washers and staked nuts. Bronze bushed sheaves with larger bearing diameter ensure an extended block life. New style hanger for fitting attachment.
Imperial Table
Block Size (in.) |
Fitting | Single Sheave | Double Sheave | Triple Sheave |
301 B* Stock No. |
302 B* Stock No. |
303 B* Stock No. |
||
4 | HS (Latch Hook) | 680971 | 681373 | 681774 |
6 | HS (Latch Hook) | 680999 | 681391 | 681792 |
8 | HS (Latch Hook) | 681015 | 681417 | 681818 |
4 | N (Swivel Hook Latch) | 682639 | 683031 | 683433 |
6 | N (Swivel Hook Latch) | 682675 | 683077 | 683479 |
8 | N (Swivel Hook Latch) | 682719 | 683111 | 683512 |
4 | P (Screw Pin Anchor) | 691031 | 692637 | 694234 |
6 | P (Screw Pin Anchor) | 691077 | 692673 | 694270 |
8 | P (Screw Pin Anchor) | 691111 | 692717 | 694314 |
Metric Table
Block Size (in.) | Fitting | Single Sheave 301 B* Stock No. | Double Sheave 302 B* Stock No. | Triple Sheave 303 B* Stock No. |
4 | HS (Latch Hook) | 680971 | 681373 | 681774 |
6 | HS (Latch Hook) | 680999 | 681391 | 681792 |
8 | HS (Latch Hook) | 681015 | 681417 | 681818 |
4 | N (Swivel Hook Latch) | 682639 | 683031 | 683433 |
6 | N (Swivel Hook Latch) | 682675 | 683077 | 683479 |
8 | N (Swivel Hook Latch) | 682 719 - | 683111 | - |
6 | P (Screw Pin Anchor) | 691 077 - | 692673 | 694270 |
8 | P (Screw Pin Anchor) | 691111 | 692717 | 694314 |
*Bearing Code: B - Self Lubricating Bronze Bushed
Imperial Specifications
Block Size (in.) |
Sheave Size (in.) |
Manila Rope Size (in.) |
Working Load Limit (lbs.)* |
Weight Each (lbs.) |
|||||
Outside Dia. |
Rim Thickness |
Single | Double | Triple | Single | Double | Triple | ||
4 | 2.25 | .63 | 1/2 | 1100 | 1600 | 2200 | 2.25 | 3.75 | 5.00 |
6 | 3.50 | 1.00 | 3/4 | 2000 | 3300 | 4000 | 5.50 | 9.25 | 12.50 |
8 | 4.75 | 1.13 | 1 | 3300 | 5100 | 7000 | 10.00 | 16.50 | 22.00 |
Metric Specifications
Block Size (in.) | Sheave Size (mm) | Manila Rope Size (mm) | Working Load Limit (t)* | Weight Each (kg.) | ||||||
Outside Dia. | Rim Thickness | |||||||||
Single | Double | Triple | Single | Double | Triple | |||||
4 | 57.2 | 16.0 | 13 | .50 | .73 | 1.00 | 1.02 | 1.70 | 2.27 | |
6 | 89.0 | 25.4 | 19 | .91 | 1.50 | 1.81 | 2.49 | 4.20 | 5.67 | |
8 | 121 | 28.7 | 26 | 1.50 | 2.31 | 3.18 | 4.54 | 7.48 | 9.98 |
*Ultimate Load is 3.5 times the Working Load Limit.
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