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Coil on a coating

Nail Knot

Coil on coating

DiagramsHow to tie it

Does not pick a knot

This page does not pick a knot for you. DNA, molecules, quantum braids and vortices stay off Decide.

Schematic — the Nail Knot family, shared by 3 knots in this catalogueFinished structure. Thick fly line meets a thinner leader; even wraps transfer onto the fly-line tip.
finished · schematic

Thick fly line meets a thinner leader; even wraps transfer onto the fly-line tip.

Finished structure

Thick fly line meets a thinner leader; even wraps transfer onto the fly-line tip.

HTH · Reference layout

Nail Knot — finished-state checks, on the shared reference layout

Nail Knot — finished-state checks, on the shared reference layout
Hook the Horizon reference plate
Failure modes

When this family fails, it fails as these. The recovered end still outranks the name.

HTH · Advanced failure modes

Nail Knot — what fails and what to do

Nail Knot — what fails and what to do
Hook the Horizon reference plate
Fly / tippet family

Fine tippet at the eye, or fly-line to leader with a tube or nail.

  • !Hitch path around the eye instead of through it
  • !Single pass where two were the job
  • !Gap at the tube or nail on a fly-line join
Fails when
  • !Crossed or gapped wraps, which leave the turns beside them loose on the fly line
  • !Wraps sprung loose as the tube was pulled out
  • !Seated by pulling only the leader, so the coil sits crooked or slides along the fly line
  • !Not pulled hard enough to bed the wraps into the fly-line coating
Geometry

  • Gapped coil on the fly-line tip

    Leader slides off the coating

    Even stacked turns transferred onto the fly line are the grip · step 02

  • Coil left on the tube, not the fly line

    That is not a Nail Knot — it will dump

    The transfer off the tool onto the coating is the knot · step 03

  • Over-trimmed before the seat completed

    The coil unravels as soon as the tag is cut

    Seat first, then trim; a short tag cannot finish the lock · step 04

  • Gap between tool and fly-line tip

    The coil hangs in air and never bites coating

    The nail or tube must sit against the tip · step 01

If you saw this

  • Leader slides off the fly-line tip

    Check

    • ?Wrap uniformity
    • ?Tag exit

    Then

    • →Retie with even wraps
    • →Seat fully before trimming

  • Barrel coils stay open on the host.

    Check

    • ?Look for: Barrel coils stay open on the host.

    Then

    • →Add wraps and seat firmly against the host.

  • Leader exits with a snag shoulder.

    Check

    • ?Look for: Leader exits with a snag shoulder.

    Then

    • →Seat so the exit continues the host line of pull.

  • Host coating splits or softens under the barrel.

    Check

    • ?Look for: Host coating splits or softens under the barrel.

    Then

    • →Retie with progressive tension; inspect host.

  • Barrel creeps on the host after load cycles.

    Check

    • ?Look for: Barrel creeps on the host after load cycles.

    Then

    • →Re-seat or retie; verify host diameter fit.

  • Finished check failed — wraps are loose or spaced

    Check

    • ?barrel wraps lie tightly on the fly line or leader tube
    • ?leader exits in line without a shoulder
    • ?coils do not telescope when loaded

    Then

    • →Retie. pullout or abrasive guide contact.

  • Gapped coil on the fly-line tip

    Check

    • ?Leader slides off the coating
    • ?Inspect step 02

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Coil left on the tube, not the fly line

    Check

    • ?That is not a Nail Knot — it will dump
    • ?Inspect step 03

    Then

    • →Retie. Do not dress a defective structure and call it seated.

  • Over-trimmed before the seat completed

    Check

    • ?The coil unravels as soon as the tag is cut
    • ?Inspect step 04

    Then

    • →Retie. Do not dress a defective structure and call it seated.
Same family

Same failure class, different geometry. Open the plates — Diagnose still starts from the symptom.

This failed — start Diagnose

What holds it

  • ·Nail and needle knots live on a fly-line coating (and, for the needle, a pierced core). The coil is the join.
  • ·A nicked core is a dead tip, not a knot you can dress out.

What topology does not predict

  • ·Coating diameter and core integrity are not topological invariants.
  • ·Loop-to-loop vs nail is a job choice already in Decide.
  • ·No rating is invented for hollow vs solid fly line.

Not for

  • ·Braid-to-fluoro in the guides as a general-purpose join
  • ·Fishing a scored, pierced tip
  • ·Braid-to-leader offshore joins (use FG / Slim Beauty family)
  • ·Equal thin mono tippet joins (Blood / Surgeon)

Same pattern, different job

No sourced twin among these knots. Related knots stay on the Library card.

Sources