Kedu ka esi amata mkpụrụ osisi rivet obere countersunk na nnukwu countersunk rivet nuts?

The rivet nut na akụkụ nke 90 Celsius bụ a nnukwu countersunk isi, mgbe rivet nut na akụkụ nke 120 Celsius bụ a obere countersunk isi.

Ọdịiche dị n'etiti ha abụọ:
1.The akụkụ nke isi dị iche.
2. Ogologo elu nke isi dị iche.