G and F nock (.166 shaft) vs X and A nock (.204 shaft): specs compared
Updated 05 September 2026.
5
specs differ
G and F nock (.166 shaft) and X and A nock (.204 shaft) differ on 5 specs: nock class, shaft inside diameter, fits, common names, fitment rule.
| Spec | G and F nock (.166 shaft) | X and A nock (.204 shaft) |
|---|---|---|
| Nock class | G / F / micro nock | X / A nock |
| Shaft inside diameter | .166 in | .204 in |
| Fits | Micro-diameter shafts: Easton 4mm, Victory VAP.166, Carbon Express XSD | 5mm shafts: Easton 5mm Axis, Easton 5mm FMJ, many 5mm hunting shafts |
| Common names | Easton G Small and N, Bohning F, AAE IP4, 4mm Microlite | Easton X, 5mm Microlite, Accu-Tough, Bohning A, AAE IP5 |
| Fitment rule | A press-fit G or F class nock seats in a.166-inch inside-diameter micro shaft. An X or S nock is too fat to enter it, and forcing one splits the shaft mouth. | An X or A class nock seats in a.204-inch inside-diameter 5mm shaft. It will not hold in a.166 micro shaft and is loose in a.245 standard shaft. |
Questions and answers
How do G and F nock (.166 shaft) and X and A nock (.204 shaft) compare?
G and F nock (.166 shaft) and X and A nock (.204 shaft) differ on 5 specs: nock class, shaft inside diameter, fits, common names, fitment rule.