
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 | UCFA209-27 | |
| Nrụpụta Mba. | UC209-27 | |
| Ebe obibi | FA209 | |
| Obere dayameta | d | 1-11/16 nke |
| Ogologo ụlọ, obosara ma ọ bụ dayameta | a | 7-3 / 64 n'arọ |
| Ebe dị anya n'ịtinye oghere | e | 5-3/4 nke anụ ọhịa |
| Ebe dị anya na-agbago elu ruo n'etiti ibu | i | 55/64 nke |
| Ogologo ụkwụ ụlọ / elu flange | g | 45/64 nke |
| Ogologo ụlọ | I | 1-37/64 nke |
| Obosara oghere oghere | s | 43/64 nke |
| Obosara ụlọ / dayameta | b | 4-3/8 n'arọ |
| Ngụkọta elu site na mgbago elu | z | 2-1/16 nke |
| Ebe dị anya n'ịtinye oghere | f | 2-53/64 nke |
| Obosara ụlọ na oghere oghere | c | 3-35/64 nke |
| Obosara mgbanaka ime | B | 1.937 n'arọ |
| Anya ihu akụkụ/ebe etiti | n | 0.748 n'arọ |
| Nha Bolt | 1/2 | |
| Ibu ibu | 2.04 n'arọ | |