
Usoro nke UC na-ezo aka na ahaziri ahazi, ejiri ọtụtụ ebe Ohiri isi ngọngọ nkeji bọọlụ nwere aka nkwụnye aka. N'ime isi ha bụ bọọlụ nwere oghere dị omimi nke nwere a dayameta mpụta okirikiri (SPB) emebere ka ọ dabara n'ime oghere okirikiri dabara adaba nke ụlọ nkedo. Na-akwado metric akụkụ, A na-ahazi usoro isiokwu a maka ngwa mmepụta ihe na-achọ ikike ibu dị elu, nrụnye kwụ ọtọ, na arụmọrụ a pụrụ ịdabere na ya.
| ISO | UCFA208-25 | |
| Nrụpụta Mba. | UC208-25 | |
| Ebe obibi | FA208 | |
| Obere dayameta | d | 1-9/16 nke |
| Ogologo ụlọ, obosara ma ọ bụ dayameta | a | 6-53/64 nke |
| Ebe dị anya n'ịtinye oghere | e | 5-19/32 nke |
| Ebe dị anya na-agbago elu ruo n'etiti ibu | i | 53/64 nke |
| Ogologo ụkwụ ụlọ / elu flange | g | 5/8 nke |
| Ogologo ụlọ | I | 1-1/2 n'arọ |
| Obosara oghere oghere | s | 19/32 nke |
| Obosara ụlọ / dayameta | b | 4-9/64 nke |
| Ngụkọta elu site na mgbago elu | z | 2-1/64 nke anụ ọhịa |
| Ebe dị anya n'ịtinye oghere | f | 2-51/64 nke |
| Obosara ụlọ na oghere oghere | c | 3-27/64 nke |
| Obosara mgbanaka ime | B | 1.937 n'arọ |
| Anya ihu akụkụ/ebe etiti | n | 0.748 n'arọ |
| Nha Bolt | 7/16 | |
| Ibu ibu | 1.74 n'arọ | |