
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 | UCFL309-28 | |
| Nrụpụta Mba. | UC309-28 | |
| Ebe obibi | FL309 | |
| Nha Bolt | 7/8 | |
| Obere dayameta | d | 1-3/4 nke anụ ọhịa |
| Mgbakọta Ogologo | a | 9-1/16 nke |
| oghere oghere Bolt | e | 6-31/32 n'arọ |
| Ọgwụgwụ Center of Bearing from Housing | i | 63/64 nke |
| Obosara flange | g | 23/32 nke |
| Obosara ụlọ | l | 1-23/32 nke |
| Nha oghere Bolt | s | 63/64 nke |
| N'ozuzu ogologo | b | 4-29/32 nke |
| N'ozuzu obosara unit | z | 2-23/64 nke |
| Obosara mgbanaka ime | B | 2.2441 n'arọ |
| Center of Bearing from Bearing End | n | 0.866 n'arọ |
| Ibu ibu | 3.122 n'arọ | |