Sandvik / Tamrock
690 390 51 O-Ring
LH410
| Part Number | 690 390 51 |
| Description | O-Ring |
| Brand | Sandvik (Tamrock) |
| Assembly | 56205156a |
| Type | Drill Rig Spare Part |
Quick answer
690 390 51 (also written 69039051, 690-390-51, or 690.390.51) is a Sandvik o-ring spare part used in the 56205156a assembly of the Sandvik LH410. Verified compatible with 2 Sandvik machine models including LH307, LH410. 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: 69039051, 690 390 51, 690-390-51.
Compatible machines
2
OEM cross-reference
690 390 51
About Sandvik 690 390 51 O-Ring
This O-ring provides critical sealing in the hydraulic or pneumatic circuits of the Sandvik LH410. Part of the 56205156a, it prevents fluid leakage at connection points and maintains system pressure integrity essential for efficient drilling operations.
This is an OEM-compatible aftermarket replacement part for the Sandvik LH410 (LH410). 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 do O-rings fail in drilling equipment?
O-rings fail due to chemical degradation from hydraulic fluid, extreme temperature cycling, excessive pressure spikes, improper installation (twisting or pinching), and age-related hardening. Using the correct material compound for each application is critical.
