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Where the theory applies
Hitch — object-dependent

Buntline Hitch

Friction on hardware · Physical hitch theory

Does not pick a knot

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

Finished structure

No drawing of this exact knot yet. The written steps are the reference.

Failure modes

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

Jam-to-hardware family

A hitch that cinches to the ring or shackle and is not meant to break by hand.

  • !Second turn tied outside — two half hitches, not a jam
  • !Expected to untie after a snatch
  • !HMPE without a splice — the hitch strips the cover
Fails when
  • !The half hitch sits on the far side of the first turn, so the end points away from the ring and it is only two half hitches.
  • !It has taken a heavy load or shock and now has to come undone; it can jam too tight to untie without a marlinspike.
  • !It was loaded with a gap to the ring or crossed turns, and shock loads jam it in that shape, which is harder to check and to free.
Geometry
  • Second turn tied outside

    This is two half hitches, not a buntline, and can walk

    The second clove turn must sit toward the ring · step 02

  • Floating clove never dressed to the ring

    Walks, then jams in the wrong place

    Dress the clove up to the ring before load · step 03

  • Expected to untie after a snatch

    Knife job on a painter you needed to cast off

    The jam is the hitch — pick round turn and two half hitches for a release · step 04

If you saw this
  • Cannot undo after load, or walks if the clove is reversed

    Check

    • ?Second clove turn toward the ring
    • ?Clove dressed to the ring

    Then

    • Leave it if it is a standing job
    • Cut and switch hitch if you needed a release
  • Second turn tied outside

    Check

    • ?This is two half hitches, not a buntline, and can walk
    • ?Inspect step 02

    Then

    • Retie. Do not dress a defective structure and call it seated.
  • Floating clove never dressed to the ring

    Check

    • ?Walks, then jams in the wrong place
    • ?Inspect step 03

    Then

    • Retie. Do not dress a defective structure and call it seated.
  • Expected to untie after a snatch

    Check

    • ?Knife job on a painter you needed to cast off
    • ?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

  • ·A hitch is object-dependent. Remove the spar, cleat, ring or pile and the structure is usually the unknot.
  • ·Bayman / Maddocks–Keller describe a no-slip regime from wrap count and friction. The prediction is approximate, and only for hitches.

What topology does not predict

  • ·Closed-loop knot invariants (Jones, Alexander) do not say whether a clove hitch will walk on a smooth spar.
  • ·No manufacturer working load is implied by wrap count.
  • ·Wet, iced, or HMPE covers change friction — topology is silent.

Not for

  • ·Joining two free rope ends — that is a bend
  • ·A standing loop that must survive after the object is gone
  • ·A job you must undo by hand after load (it jams)
  • ·HMPE without a splice

Same pattern, different job

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

Sources