| Block Size (in.) | Fitting | Single Sheave | Double Sheave | Triple Sheave | |||
| 21 B Galv | 22 B Galv | 23 B Galv. | |||||
| CERTEX Cat. Ref. No. | Crosby Stock No. | CERTEX Cat. Ref. No. | Crosby Stock No. | CERTEX Cat. Ref. No | Crosby Stock No. | ||
| 3 | HS | CX13-0376 | 603813 | CX13-0402 | 604616 | CX13-0426 | 605410 |
| 4 | HS | CX13-0377 | 603831 | CX13-0403 | 604634 | CX13-0427 | 605438 |
| 5 | HS | CX13-0378 | 603859 | CX13-0404 | 604652 | CX13-0428 | 605456 |
| 6 | HS | CX13-0379 | 603877 | CX13-0405 | 604670 | CX13-0429 | 605474 |
| 8 | HS | CX13-0380 | 603911 | CX13-0406 | 604714 | CX13-0430 | 605517 |
| 3 | N | CX13-0381 | 606419 | CX13-0407 | 606810 | CX13-0431 | 607212 |
| 4 | N | CX13-0382 | 606437 | CX13-0408 | 606838 | CX13-0432 | 607230 |
| 5 | N | CX13-0383 | 606455 | CX13-0409 | 606856 | CX13-0433 | 607258 |
| 6 | N | CX13-0384 | 606473 | CX13-0410 | 606874 | CX13-0434 | 607276 |
| 8 | N | CX13-0385 | 606516 | CX13-0411 | 606918 | CX13-0435 | 607310 |
| 3 | S | CX13-0386 | 610011 | CX13-0412 | 611617 | CX13-0436 | 613214 |
| 4 | S | CX13-0387 | 610039 | CX13-0413 | 611635 | CX13-0437 | 613232 |
| 5 | S | CX13-0388 | 610057 | CX13-0414 | 611653 | CX13-0438 | 613250 |
| 6 | S | CX13-0389 | 610075 | CX13-0415 | 611671 | CX13-0439 | 613278 |
| 8 | S | CX13-0390 | 610119 | CX13-0416 | 611715 | CX13-0440 | 613312 |
| Block Size (in.) | Sheave Diameter (in.) |
Manila Rope Size (in.) | Working Load Limit* (lbs.) |
Weight Each (lbs.) |
||||||
| Outside Diam. | Rim Thickness | Center Pin Diam. | 21 Single | 22 Double | 23 Triple | 21 Single | 22 Double | 23 Triple | ||
| 3 | 1.75 | .50 | .38 | 3J8 | 500 | 800 | 1200 | 1.00 | 1.75 | 2.50 |
| 4 | 2.25 | .63 | .38 | 112 | 1000 | 1400 | 1800 | 1.75 | 3.00 | 4.00 |
| 5 | 3.00 | .75 | .38 | 518 | 1200 | 1800 | 2400 | 3.25 | 5.60 | 6.50 |
| 6 | 3.50 | 1.00 | .50 | 314 | 1800 | 2500 | 3200 | 5.00 | 8.50 | 11.50 |
| 8 | 4.75 | 1.13 | .63 | 7/8-1 | 2800 | 3800 | 4800 | 9.00 | 14.00 | 21.50 |
*Ultimate Load is 4 times the Working Load Limit.
Note: We furnish beckets on all blocks.
WARNING: Prop 65: Products supplied by CERTEX USA may expose you to chemicals including Nickel, which is known to the State of California to cause cancer. For more information, visit to www.P65Warnings.ca.gov.
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