
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 | UCT309-28 | |
| Nrụpụta Mba. | UC309-28 | |
| Ebe obibi | T309 | |
| Obere dayameta | d | 1-3/4 nke anụ ọhịa |
| Ogologo oghere mgbakwunye | o | 15/16 nke |
| Ọgwụgwụ mgbakwunye ogologo | g | 25/32 nke |
| Elu nke mgbakwunye njedebe | p | 3-17/32 nke |
| Elu nke oghere mgbakwunye | q | 2-5/32 nke anụ ọhịa |
| Dayameta nke mgbakwunye bolt oghere | s | 1-11/32 nke anụ ọhịa |
| Ogologo uzo piloting | b | 3-13/16 nke |
| Obosara uzo piloting | k | 0.709 n'arọ |
| Ịgba elu | e | 4-59/64 nke |
| N'ozuzu elu | a | 5-7/16 nke |
| N'ozuzu ogologo | w | 7 in |
| N'ozuzu obosara | j | 2-5/32 nke anụ ọhịa |
| Obosara oghere | l | 1-1/2 n'arọ |
| Ebe dị anya site na njedebe ihu ruo na ahịrị etiti nke dayameta oche okirikiri | h | 4-11/32 nke |
| Obosara mgbanaka ime | B | 2.2441 n'arọ |
| Center of Bearing from End | n | 0.866 n'arọ |
| Ibu ibu | 4 n'arọ | |