Caterpillar part numbers starting S15
| S1571 | Bolt (expansion tank, water) | Caterpillar | ||
| S1585 | Bolt | Caterpillar | ||
| S1587 | Bolt, 4.5 cm (1.75 in.) long (front housing) | Caterpillar | ||
| S1588 | Bolt (turbocharger, air lines) | Caterpillar | ||
| S1590 | Bolt | Caterpillar | ||
| S1591 | Bolt (turbocharger, air lines) | Caterpillar | ||
| S1594 | Bolt | Caterpillar | ||
| S1595 | Bolt (rear gear group) | Caterpillar |