Caterpillar part numbers starting OS1
| OS1585 | Bolt (water lines, lower) | Caterpillar | ||
| OS1587 | Bolt (expansion tank) | Caterpillar | ||
| OS1590 | Bolt (expansion tank) | Caterpillar | ||
| OS1594 | Bolt (water lines, upper) | Caterpillar | ||
| OS1595 | Bolt (expansion tank) | Caterpillar | ||
| OS1954 | Bolt (water lines, bypass) | Caterpillar |