Which knot for which line, and where each one actually fails.
These knots are not ranked, they are matched. The improved clinch grips by coils and slips on braid. The Palomar passes doubled through the eye and holds braid. The uni does both jobs and also joins two lines. The FG is thinner than any of them and much harder to tie.
Pick the one that suits the line in your hand, then tie it well — how you seat a knot matters more than which of these you chose.
| Knot | Line | Use | Difficulty | Where it fails |
|---|---|---|---|---|
| Palomar Knot | Braid (also strong on fluorocarbon) | Braid to hook, lure or swivel | Easy | The whole lure or hook has to pass through the loop, so it is impractical with large lures or anything carrying multiple treble hooks. |
| Improved Clinch Knot | Monofilament, fluorocarbon | Mono or fluoro to terminal tackle | Easy | Prone to slipping on braid. Use more wraps on light line and fewer on heavy line: thick line will not seat properly with too many turns. |
| Uni Knot | Braid, monofilament, fluorocarbon | Almost anything, and joining two lines | Easy to moderate | The double uni sits bulkier than an FG knot, so it knocks through the rod guides on a long cast. |
| FG Knot | Braid to mono or fluoro leader | Braid to leader | Hard | Genuinely difficult, and much harder in wind or on a moving boat. Learn it at home before you need it. |
| Non-Slip Loop Knot | Monofilament, fluorocarbon | Lures that need free movement | Moderate | The loop becomes a weak point if tied carelessly, and it is the wrong choice when you want locked-down, direct contact with the lure. |
One step apart, and the step is the whole knot. Both wrap the tag around the standing line and pass it back through the small loop above the eye. The improved version then passes the tag through the large loop it has just created. That final tuck is what stops the coils drawing through under load.
There is no reason to tie the plain version. If you learned it without the last step, you learned the weaker knot.
They hold by different mechanisms, which is why they fail in different places. The improved clinch relies on coils gripping one another — mono and fluorocarbon have enough memory and surface friction for that, and braid does not, which is why it slips.
The uni is a barrel of wraps that tightens onto itself, so it holds on braid too. And two unis tied facing each other join two lines, which the clinch cannot do in any form. If you only learn one of the two, learn the uni for its range — but on mono to a hook, the improved clinch is quicker and perfectly good.
Not a close call. Braid is slick and has no memory, so a knot that depends on coils biting into the line has little to bite. The Palomar passes the line through the eye doubled, so braid grips against braid. It is also hard to tie badly, which matters at dawn with cold hands.
Its one real limit: the whole lure has to pass through the loop, so it is impractical with big baits or multiple trebles.
The FG grips by compression along its length rather than forming a bulky knot, so it is far thinner and passes through the rod guides almost unnoticed — which is what makes long casts with a leader practical. It is also genuinely difficult, and much harder in wind or on a moving boat.
The double uni is easier, reliable, and bulkier. It knocks through the guides. If you are casting a long way, learn the FG at home first; if you are not, the double uni is a sensible answer.
Pages ranking these knots by percentage of line strength retained disagree with each other, sometimes by twenty points for the same knot, because results shift with line brand and diameter, lubrication, how the knot was seated and how load was applied. We do not publish a number we cannot stand behind.
The more useful truth: how you tie it matters more than which you tie. Wet it, seat it in one smooth pull, match wrap count to line diameter, and leave a tag. Full instructions for each knot.
The improved clinch adds one final step: after passing the tag through the small loop above the eye, you pass it back through the large loop you have just formed. That tuck is what locks the knot. Without it the coils can slip under load, which is why the plain clinch is materially weaker and why the improved version is the one worth learning.
Neither is better in the abstract; they fail in different places. The improved clinch holds by coils gripping against each other, which works on monofilament and fluorocarbon and slips on braid. The uni is a sliding barrel that tightens onto itself and holds on all three, and two unis tied facing each other join two lines — something the clinch cannot do at all.
The Palomar for terminal tackle, because the line passes through the eye doubled and grips braid against itself rather than relying on coils biting into a slick surface. For joining braid to a leader, the FG knot is thinner and passes through the rod guides; the double uni is easier to tie and bulkier.
Because the published tests disagree, sometimes by twenty points for the same knot. Results shift with line brand and diameter, whether the knot was lubricated, how it was seated, and how the test applied load. We do not print figures we cannot stand behind — the structural reason each knot suits a line is more useful and more honest.