LTH Castings categorises its suppliers into 2 segments: direct purchase suppliers and indirect purchase suppliers. Direct purchase suppliers constitute suppliers whose products are used directly in the products; all other suppliers are categorised as indirect purchase suppliers.

The direct purchase suppliers group includes suppliers who supply the following goods:

1. Al alloys
2. Components
3. Cooperation (areas of Al alloy castings, sandblasting, mechanical treatment, manual processing, surface finish)

The indirect purchase suppliers group includes suppliers who supply the following goods:

1. Energy (electrical power, gas, etc.)
2. Cutting tools (specialised tools, standard tools, etc.)
3. Transportation
4. Lubricants, coatings
5. Standard parts
6. Packaging
7. Office supplies
8. Services
9. Spare parts