Easton Deep Six 6/40 thread: what broadheads and points fit
What the Deep Six 6-40 micro thread fits, the fitment rule, and the mismatch to avoid.
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.
| Thread standard | 6-40 (Deep Six) |
|---|---|
| Fits | 4mm micro shafts fitted with a Deep Six insert; Deep Six heads only |
| Fitment rule | Deep Six is a smaller 6-40 thread for 4mm micro shafts whose bore is too small for a standard 8-32 shank. A standard 8-32 field point will not thread into a Deep Six insert, and a Deep Six head will not thread into a standard 8-32 insert. |
| Note | Few makers offer Deep Six heads, so check which insert your arrow has before buying broadheads; a standard point simply will not go in. |
Field notes
Fits: 4mm micro shafts fitted with a Deep Six insert; Deep Six heads only.
Deep Six is a smaller 6-40 thread for 4mm micro shafts whose bore is too small for a standard 8-32 shank. A standard 8-32 field point will not thread into a Deep Six insert, and a Deep Six head will not thread into a standard 8-32 insert.
Few makers offer Deep Six heads, so check which insert your arrow has before buying broadheads; a standard point simply will not go in.
Threads, arrows and the grain floor
Sources: SEVR Broadheads - Deep Six vs 8-32: learn the difference · Iron Will Outfitters - Deep Six Hunting Arrow System