| Item | Part No. | Part Name | Qty | Serial No. |
| 23S-P50-5010 | HOOK BLOCK ASS'Y,12TON | 53001- | ||
| 1 | 23S-P50-2110 | HOOK | 53001- | |
| 2 | 23S-P50-2120 | TRUNNION | 53001- | |
| 3 | 23S-P50-2130 | NUT | 53001- | |
| 4 | 23S-P50-2140 | PLATE,L.H. | 53001- | |
| 5 | 23S-P50-5150 | PLATE,R.H. | 53001- | |
| 6 | 23S-P50-2160 | PIN | 53001- | |
| 7 | 23S-P50-2170 | COVER | 53001- | |
| 8 | 23S-P50-2350 | PLATE | 53001- | |
| 9 | 23S-P50-2320 | PLATE | 53001- | |
| 10 | 23S-P50-2330 | SPRING | 53001- | |
| 11 | 01010-80860 | BOLT | 53001- | |
| 12 | 23S-P50-2340 | NUT | 53001- | |
| 13 | 23S-P50-2211 | SPACER | 53001- | |
| 14 | 23S-P50-2221 | SPACER | 53001- | |
| 15 | 23S-P50-2230 | GUIDE | 53001- | |
| 16 | 23S-P50-2240 | BOLT | 53001- | |
| 17 | 23S-P50-2250 | BAR | 53001- | |
| 18 | 23S-72-51180 | PLATE | 53001- | |
| 19 | 23S-P50-2291 | SHEAVE | 53001- | |
| 20 | 06032-06214 | BEARING | 53001- | |
| 21 | 23S-P50-2310 | PLATE | 53001- | |
| 22 | 01010-81630 | BOLT | 53001- | |
| 23 | 01435-01020 | BOLT | 53001- | |
| 24 | 01580-11210 | NUT | 53001- | |
| 25 | 01643-31645 | WASHER | 53001- | |
| 26 | 06000-51214 | BEARING | 53001- | |
| 27 | 07020-00001 | FITTING | 53001- | |
| 28 | 01643-31645 | WASHER | 53001- |