S and Super nock (.245 shaft) vs X and A nock (.204 shaft): specs compared
Updated 05 September 2026.
5
specs differ
S and Super nock (.245 shaft) and X and A nock (.204 shaft) differ on 5 specs: nock class, shaft inside diameter, fits, common names, fitment rule.
| Spec | S and Super nock (.245 shaft) | X and A nock (.204 shaft) |
|---|---|---|
| Nock class | S / Super nock | X / A nock |
| Shaft inside diameter | .245 in | .204 in |
| Fits | Standard 6.5mm shafts: most Easton 6.5mm and Carbon Express shafts | 5mm shafts: Easton 5mm Axis, Easton 5mm FMJ, many 5mm hunting shafts |
| Common names | Easton S, Super, 6.5mm Microlite, 3D Super, Black Eagle STD, AAE IP6 | Easton X, 5mm Microlite, Accu-Tough, Bohning A, AAE IP5 |
| Fitment rule | An S (Super) nock seats in a.245-inch inside-diameter standard shaft. It is a hair smaller than a GT nock, so it is loose in a.246 Gold Tip shaft and can fail there. | 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 S and Super nock (.245 shaft) and X and A nock (.204 shaft) compare?
S and Super nock (.245 shaft) and X and A nock (.204 shaft) differ on 5 specs: nock class, shaft inside diameter, fits, common names, fitment rule.