


Sandvik / Tamrock
550 503 56 Hexagon socket set screw
DS421
| Part Number | 550 503 56 |
| Description | Hexagon socket set screw |
| Brand | Sandvik (Tamrock) |
| Assembly | CRADLE ASSY |
| Type | Drill Rig Spare Part |
Quick answer
550 503 56 (also written 55050356, 550-503-56, or 550.503.56) is a Sandvik hexagon socket set screw spare part used in the CRADLE ASSY assembly of the Sandvik DS421. Verified compatible with 2 Sandvik machine models including DS421, DS421-C. Available as an aftermarket replacement drill part from BK Drilling — Turkey-based Sandvik and Epiroc spare parts supplier serving mining contractors worldwide. Quote on request via WhatsApp; typical lead time 3-7 days for stock items.
Part code alternate forms: 55050356, 550 503 56, 550-503-56.
Compatible machines
2
OEM cross-reference
550 503 56
About Sandvik 550 503 56 Hexagon socket set screw
Designed for the demanding environment of the Sandvik DS421, this fastening component secures critical elements within the CRADLE ASSY. Mining equipment fasteners are subject to strict torque specifications and material requirements to maintain structural safety during operation.
This is an OEM-compatible aftermarket replacement part for the Sandvik DS421 (DS421). Also compatible with Tamrock branded equipment of the same model series. BK Drilling supplies this part with fast worldwide shipping and competitive pricing.
Frequently asked questions
Why use OEM-compatible parts for Sandvik drilling equipment?
OEM-compatible parts are manufactured to the same dimensional tolerances and material specifications as original components, ensuring proper fit, reliable performance, and maintaining the designed safety margins of the drilling machine.






