X and A nock (.204 shaft): which arrows it fits
The shaft inside diameter a X / A nock fits, the shafts that use it, and the fitment rule.
Dry-fire warning
Crossbow bolt data and archery arrow spine, nock and thread data are quoted from each manufacturer's published figures, owner documentation and industry standards, cited on every page. A nock, spine or grain-weight mismatch can cause a dry-fire that damages the bow and can injure the shooter. Confirm against your own owner's manual and the arrow maker's own chart before shooting, and never drop below the stated minimum total weight.
| Nock class | X / A nock |
|---|---|
| Shaft inside diameter | .204 in |
| Fits | 5mm shafts: Easton 5mm Axis, Easton 5mm FMJ, many 5mm hunting shafts |
| Common names | Easton X, 5mm Microlite, Accu-Tough, Bohning A, AAE IP5 |
| Fitment rule | 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. |
Field notes
Fits: 5mm shafts: Easton 5mm Axis, Easton 5mm FMJ, many 5mm hunting shafts.
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.
Press-fit nocks are sized to the shaft inside diameter, not the outside, so match the bore in thousandths of an inch or the nock is loose or will not seat.
Shafts and neighbouring nocks
Sources: Lancaster Archery - Arrow Nocks: Everything You Need to Know