SMALL FLY · TIPPET
Tie a Clinch Knot onto a size 20 fly and then look at what you’ve made. It’s a golf ball glued to a gnat. The Davy is the fix. It doesn’t build a barrel. It locks a tiny overhand structure around itself, and that’s why there’s almost no plastic sitting at the nose of a size 18–22 fly. Tying on something hopper-sized? That’s the Double Davy’s job, since the one extra pass gives a bigger fly the grip it asks for.
One overhand, one return, and almost nothing left at the eye
Nylon or fluorocarbon fly tippet.
Small flies, especially around sizes 18–22 — the exact range where a bulkier knot starts fighting the fly instead of helping it.
Braid or bulky conventional tackle.
Tiny, centered, with no loose side loop.
Small because the tag locks instead of coils.
The tag crosses the standing tippet through a loose overhand knot, then returns through the same working opening between the knot and the fly. Now the order matters. Pulling the tag is what organizes the lock, and that has to happen first. The standing tippet comes second, once the knot exists, and it rides the finished thing up to the eye. Reverse those two and you’re tightening a knot that hasn’t formed yet. It’s an easy habit to fall into when you’re rushing, and slowing down for one pull is usually enough to feel the difference.
Pull the tag before you pull the line
- Pass 3–4 inches of tippet through the eye.
- Form a loose overhand knot in front of the fly.
- Bring the tag back through the working loop between the overhand knot and the fly.
- Pull the tag first to organize the knot, then the standing tippet to seat it.
- Pull-test and trim.
Why a Davy comes undone
The tag returns on the wrong side. The standing line gets yanked before the tag has organized the lock. An oversized heavy-wire hook goes onto very light tippet. Or the working tag was too short to control from the start.
Use
Tiny dry flies and other small patterns where every bit of knot mass shows.
Skip
Bigger heavy-gauge hooks, braid, or any time a larger knot is just easier to seat right.
When the fly gets bigger
Double Davy: one extra locking pass for larger flies. Orvis: a wider tippet-and-hook range. Clinch: the familiar fast light-tippet option, and fine right up until the fly gets small enough for the barrel to outweigh it.
HOW I CHECK IT
Watch which side the tag comes back through.
NetKnots’ animation, Tightline Productions’ Davy and Double Davy video, Orvis News’s pro-tips walkthrough, and Orvis’s technique notes are worth slowing down frame by frame, because the whole knot happens fast and small. My own seat check is simple: the tag should exit at about 90 degrees to the standing line at the eye. That orientation is the strength cue for a single Davy, and if I don’t see it, the fly comes back off no matter how good the knot looks otherwise.
Open the deeper knot workflowJob, material, route, dressing, seating, pull-test checks and the standardized comparison record.
THE SIX-MOVE CHECK
Job → Material → Route → Dress → Seat → Test
- Job. Name what the connection has to do before choosing the knot.
- Material. Confirm the line, leader, rope, wire, and hardware actually suit this structure.
- Route. Trace every pass before tightening anything.
- Dress. Put strands, wraps, and loops in their intended order with no accidental crossings.
- Seat. Tighten in the order this knot needs. More force does not repair bad geometry.
- Test. Inspect the finished shape, load it by hand when appropriate, and retie if anything moves or fails the article-specific checks.
Practice / pass test. Tie this knot three clean times without rushing. A tie passes only when it matches this article’s What to check before you trust it geometry, shows none of the listed failure clues, and survives the stated load/inspection test. If you cannot tell why one attempt is better than another, keep practicing—the lesson is recognition, not memorization.
KNOT SPEC
Davy Knot — the short answers
- ALSO CALLED
- Davy Knot. Credited to Welsh fly angler Davy Wotton, and the name travels unchanged in Britain and the United States. No meaningful regional alias. Used almost entirely by fly anglers, heaviest among trout and grayling fishers working small dries and nymphs.
- KNOT TYPE
- Terminal fly knot, tag locked back through a single overhand
- WHAT IT CONNECTS
- Tippet to fly, and nothing else. Not a line-to-line knot, not a loop knot, and not a connection for lures, swivels, split rings or any other hardware.
- LINE TYPES
- Nylon and fluorocarbon tippet, roughly 4X and finer. Not for braid — there is too little internal grip and the tag walks out. Not for wire, and never tied directly in fly line.
- STRENGTH BAND
- Solid on fine tippet, and honest about its ceiling. Tied well on a small hook it holds close to what light tippet will give, but all the grip comes from one lock, so it falls away as hook and tippet size climb.
- DIFFICULTY
- Beginner to tie, intermediate to tie right every time. Few moves, but the tag must return on the correct side and the pull order is not optional. A child learns the shape in minutes and gets consistent over a session.
- STEPS AND WRAPS
- Five moves and no wrap count: thread the eye, one loose overhand, one return pass through the working loop, pull the tag, then pull the standing tippet. No braid variant exists, because it is not a braid knot.
- TIE TIME
- Fast, and a streamside knot rather than a bench knot. Ten to fifteen seconds once learned, which is the whole argument for it at dusk when the fish have moved onto size 20s.
- POOR CONDITIONS
- Good in wind and on moving water because there is nothing to count and almost no line to manage. Cold hands and low light are the limit, and the obstacle is threading a size 22 eye rather than the knot itself.
- THROUGH THE GUIDES
- The smallest terminal profile in common fly use. It clears guides and the tip-top without a click, and it leaves so little mass at the nose that hackle and floatant have nothing to collect on.
- LUBRICATION
- Yes. Wet it before the seating pull. Fine tippet is the least forgiving diameter you will fish, and a dry cinch on 6X or 7X damages the line inside the knot before the first cast.
- TAG END
- Leave three to four inches to work with — a short working tag is the single most common cause of a crooked Davy. Trim close after testing, about a sixteenth of an inch. No braid difference, because braid is not on the menu.
- TOOLS
- None for the knot. Nippers to trim. Magnification and a hook threader help more than any knot tool, because the hard part on a size 22 is the eye, not the tying.
- BEST SUITED TO
- Trout and grayling above all, plus panfish on small patterns. Not species-specific so much as fly-size specific — chosen by hook size and tippet diameter, not by what eats the fly.
The strength bands are rough on purpose. Published knot tests don’t agree with each other — the same braid-to-leader knot has tested near ninety percent of line strength on one machine and under half on another, because the line brand, its diameter, how fast it got cinched, whether it was wet and whose hands tied it all move the number more than the knot does. Use the band to compare this knot with the others, not as a number to quote.
ONE LOCK, NO SPARE
Nothing sits ahead of a size 20 and nothing slows down a fly change in fading light. There is also only one lock holding the whole thing, so the margin runs out as the hook gets bigger.
Advantages
- Almost no mass at the nose of the fly, so a size 18 to 22 pattern still sits and drifts the way it was tied to.
- Very few moves and no wrap count, which makes it one of the fastest fly changes available in fading light.
- Uses little tippet per tie, so a leader survives more fly changes before it needs rebuilding.
- The finished knot gives a clear visual cue — the tag exits near a right angle to the standing line — so you can grade it before you fish it.
Disadvantages
- Grip comes from one lock only, so its margin on heavier tippet and bigger hooks is thin.
- The tag can return on the wrong side and still look roughly right until it is loaded.
- Pull order matters. Seat the standing line first and you tighten a knot that has not formed yet.
- It is unforgiving of a short working tag, which is exactly what you have left at the end of a long leader.
- No use at all outside fly tippet — it does not transfer to braid, hardware or heavy line.
Use a different knot when
- Double Davy — when the fly is around size 16 or larger and one lock stops feeling like enough knot
- Orvis Knot — when you want one compact knot that covers a much wider range of fly and tippet sizes
- Improved Clinch — when you would rather have a familiar wrapped knot and can accept more bulk at the eye
- Non-Slip Loop Knot — when a streamer or nymph needs to swing freely instead of being locked to the eye
WHAT TO CHECK BEFORE YOU TRUST IT
The Davy earns its place on the smallest end of the box, where the argument is not strength but bulk. On a size 20 dry, a wrapped knot is a visible lump ahead of the hook and it changes how the fly sits. The Davy leaves almost nothing there. The useful check is the tag: it should leave the finished knot at close to a right angle to the standing tippet. Anything flatter means the return pass took the wrong side. The real tradeoff is margin. This is a small knot with one lock, so retie it freely instead of defending one.
What actually makes it fail
- The tag returning through the working loop on the wrong side, which builds a knot that looks tidy and slips under load.
- Pulling the standing tippet before the tag, so the lock never organizes and the structure closes half formed.
- A heavy-wire hook on very light tippet, where the hook simply outmatches what the knot can hold.
- Cinching dry on 6X or 7X, which cooks the tippet inside the knot.
- Working with a tag too short to control, leaving a lopsided knot with the bump off to one side.
How to test it, and how it ages
Wet it, draw the tag down first until the lock organizes, then pull the standing tippet to run the knot up to the eye. Then look at it: one small centered bump against the eye, no loose side loop, tag leaving near a right angle. Load it with a steady pull straight against the tippet before the fly touches water — steady, not a snatch, because a jerk on 6X tells you nothing and can break line that would have fished. If the bump sits off to one side, cut it off and tie another.
Over a session: Stable through a session as long as it was seated properly to begin with, since there is little in it to work loose. Check it after every fish and after any contact with rock or weed, and expect to retie whenever you change flies anyway.
Troubleshooting
Why does it keep coming out crooked?
You are working with too little tag. Pull three to four inches through the eye before you start, even though it feels wasteful on a short tippet.
Why did it slip when the fish took?
Almost always the return pass on the wrong side, or the standing line pulled before the tag. Both build a knot that photographs fine and holds nothing.
Why does it fail on bigger flies?
It is not built for them. One lock runs out of grip as hook and tippet size climb — move to the Double Davy at around size 16.
Can I use this on braid?
No. Braid is slick and this knot has very little internal bite. Use a Palomar or a knot designed for braid instead.
Why can I barely see what I am doing?
Because the knot is genuinely tiny. Magnifiers and a hook threader fix more Davy problems than any change to the tying itself.
FIELD OBJECT
This one should leave the page.
The article is the long version. These are the pieces worth carrying into the next trip.
The 30-second version
On a size 20 dry, the knot can be the biggest thing at the front of the fly. The Davy leaves almost nothing there, as long as you pull the tag before the standing line.
What to watch
- One overhand, one return, and almost nothing left at the eye
- Small because the tag locks instead of coils.
- Pull the tag before you pull the line
- The off-center bump
Field card
- Pass 3–4 inches of tippet through the eye.
- Form a loose overhand knot in front of the fly.
- Bring the tag back through the working loop between the overhand knot and the fly.
- Pull the tag first to organize the knot, then the standing tippet to seat it.
- Pull-test and trim.
RIGHT TOOL, NEXT
Knot Analyst
Carry the connection problem into a knot choice built around line, hardware, conditions, and failure mode.
