
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 | UCPA 207-21 | |
| Nrụpụta Mba. | UC 207-21 | |
| Ebe obibi | PA207 | |
| Obere dayameta | d | 1-5/16 nke |
| Ebe mgbago anya gaa na okirikiri etiti. oche diam | h | 1-7/8 nke |
| Ogologo ụlọ | a | 4-21/64 nke |
| Ebe dị anya n'ịtinye oghere | e | 3-5/32 nke anụ ọhịa |
| Obosara ụlọ | b | 2-11/64 nke |
| Nha Bolt | S | M14 |
| Omimi eri ngwunye oghere | I | 25/32 nke |
| Ogo ụkwụ ụlọ | g | 33/64 nke |
| Ogologo ụlọ | w | 3-47/64 n'arọ |
| Obosara mgbanaka dị n'ime | B | 1.689 nke |
| Anya ihu akụkụ/ebe etiti | n | 0.689 n'arọ |
| Ibu ibu | 1,581 n'arọ | |