| HS-301-B SINGLE  | N-302-B DOUBLE  | P-303-B TRIPLE  |
Western Malleable Iron Shell Blocks
| HS-301-B SINGLE | N-302-B DOUBLE | P-303-B TRIPLE |
| Block Size (in.) | Fitting | Single Sheave | Double Sheave | Triple Sheave | |||
| 301 B Stock No. Galv. | 301 R Stock No. Galv. | 302 B Stock No. Galv. | 302 R Stock No. Galv. | 303 B Stock No. Galv. | 303 R Stock No. Galv. | ||
| 4 | HS | 680971 | 680775 | 681373 | 681177 | 681774 | 681578 |
| 6 | HS | 680999 | 680793 | 681391 | - | 681792 | - |
| 8 | HS | 681015 | 680819 | 681417 | - | 681818 | - |
| 4 | N | 682639 | 682434 | 683031 | - | 683433 | - |
| 6 | N | 682675 | - | 683077 | - | 683479 | - |
| 8 | N | 682719 | - | 683111 | - | 683512 | - |
| 4 | P | 691031 | - | 692637 | - | 694234 | - |
| 6 | P | 691077 | - | 692673 | - | 694270 | - |
| 8 | P | 691111 | - | 692717 | - | 694314 | - |
Bearing Code: B - Self Lubricating Bronze Bushed, R - Roller Bearing.
| Block Size (in.) | Sheave Size (in.) | Manila Rope Size (in.) | Working Load Limit * (lbs.) | Weight Each (lbs.) | |||||
| Outside Diam. | 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 |
* Ulimate Load is 3.5 times the Working Load Limit.
Click here for Heavier Capacity Blocks.
