crimping, C-height, conductor crimp, insulation crimp, crimp specification
A crimp replaces solder in automotive harnesses for good reasons. It is fast, it is repeatable, and it does not create a rigid joint that cracks under vibration. The terminal's conductor barrel is compressed around the stripped strands until the metals cold-weld under pressure, giving a gas-tight joint with low resistance. The insulation barrel grips the insulation separately and takes the mechanical strain, so the conductor crimp never sees it.
Crimp height, sometimes called C-height, is the measured height of the finished conductor crimp, and it is how the process is controlled. Too high and the strands are under-compressed: resistance rises, the joint oxidises and heats, and it fails months later. Too low and the strands are cut, which gives a brittle crimp that passes a pull test on the bench and breaks on the line. The manufacturer publishes a crimp height window and a pull-force minimum for each terminal against each wire size, and the applicator, the die and the terminal have to be the combination that window was validated on.
This is why terminal substitution is not a purely commercial decision. A terminal from a different family, or the same family in a different plating or a different wire range, can require a different applicator and a different crimp height. A buyer who accepts an alternative without checking it against the tooling on the floor has moved a shortage from purchasing into production.
Packaging format matters for the same reason. Terminals for automated crimping come on reels wound to a specific orientation and pitch. The same terminal supplied loose or in bandolier form will not run on a reel-fed applicator, and a delivery that cannot be loaded is a delivery that has not solved anything.
Harness Code states the pack format alongside the part, and where an alternative terminal is proposed, states the wire range and plating so the buyer can check it against their crimp specification before committing.
Related terms
Terminal / contact
A terminal, or contact, is the metal part crimped to a wire and inserted into a connector housing to make the electrical connection. Terminals are specified by family, gender (pin or socket), wire cross-section range, and plating, typically tin or gold.
Wire gauge (AWG and mm2 cross-section)
Wire gauge describes a conductor's cross-sectional area. European automotive drawings state it in square millimetres, for example 0.35, 0.5, 0.75. American drawings use AWG, where a higher number means a thinner wire. The two systems do not map onto each other exactly.
Contact plating (tin vs gold)
Contact plating is the metal coating on a terminal's mating surface, most often tin or gold. Plating decides contact resistance, corrosion behaviour and how many mating cycles a contact survives. Tin and gold contacts should not be mated to each other.
Cross-reference and drop-in equivalent
A cross-reference maps one manufacturer part number to a comparable part from another family or another manufacturer. A drop-in equivalent is a cross-reference matching on form, fit and function, usable without any change to the harness, the tooling or the mating half.