To choose a YKK zipper slider for continuous zipper chain, match the full chain series, size designation, coil orientation and required locking function. A “No. 5” label, a similar pull tab or the brand name alone is not enough. Identify the chain first, find the slider configuration specified for it, then test the pair on a sample.
This guide is for technologists and buyers specifying zippers for bags, covers, clothing and other products. It helps prepare a precise enquiry but does not replace manufacturer confirmation of a particular combination. Checked on 9 October 2026.
Slider and pull tab: which component do you need?
The slider is the body that travels along the chain, joining or separating its elements. The pull tab is the part you hold: a tab, ring or another configuration. Replacing the pull tab does not mean replacing the complete slider; whether it can be replaced depends on the construction.
When requesting a replacement, specify whether you need a separate slider with its pull tab, only a pull tab, or a finished zipper. Browse the sliders and pullers category for components and the YKK brand page for the manufacturer’s product direction.
How to choose a YKK zipper slider: five checks
- Identify the chain construction. Coil, metal and moulded plastic zippers use different constructions. Do not move a slider between them merely because the size numbers match.
- Record the full series. Keep all letters and numbers from the roll label, order or specification, such as 3CF or 5CNF. Without a label, provide a sample and clear photographs of both sides; do not guess the article code from appearance.
- Check the size designation. YKK uses a number related to the width of the closed chain. It is a size designation, not automatically an exact width in millimetres. In particular, 45CF is an intermediate size between 3CF and 5CNF, not 45 mm.
- Confirm the operating orientation. For standard and reverse configurations, check which side carries the coil, tape and pull tab. Coated tape or a special series needs separate verification; the same number does not prove compatibility.
- Choose the function and pull-tab configuration. Must the slider hold its position? Do you need access from both sides? Can the tab be gripped with gloves? These answers define your requirements rather than establish the properties of any particular model.
See YKK’s official explanation of zipper sizes. A calliper measurement helps describe the sample but does not replace its series and specification.
Auto-lock, non-lock and two pull tabs: what changes?
An automatic-lock slider locks when the pull tab is released and unlocks when it is pulled. A non-lock slider has no such locking action. YKK also describes other mechanisms, including cam-lock and semi-automatic; these should not be grouped together under a single “locking” specification.
Two pull tabs on one slider body provide a different access arrangement from two separate sliders on one zipper. Specify the construction you actually need. A pocket that should stay closed and a cover opening requiring access from both sides may have different requirements; verify the final configuration in the product.
Check the function names in YKK’s official slider-code guide. A photograph of the pull tab does not establish the locking mechanism.
DELIM catalogue examples: reading the item name
- YKK DALH5 slider for 3CF: DALH5 is the model, while 3CF is the stated chain series. The final digit in the model name is not a reason to order it for any No. 5 zipper.
- YKK DA8LHN5 slider for 5CNF: check the entire code and corresponding 5CNF configuration, rather than a digit shared with another component.
- YKK 5CNF JI20 zipper chain: JI20 identifies the jacquard-tape option shown in the catalogue. This is a chain listing, not a finished set supplied with any slider.
These items illustrate the difference between a slider code, chain series and tape configuration. This is not a compatibility table: confirm the exact option and sample even within one series. The designations were checked against the YKK Coil catalogue, PDF pages 7 and 11. Browse other chains in the coil category.
What to test on a sample before production
Test the pair both on a loose length and in a trial assembly using your fabric, seam and lining. For a curved bag or cover opening, check the actual geometry. This is a suggested production-check sequence, not a YKK test standard.
- The slider travels in the intended direction without jamming; the chain closes and does not separate behind it.
- The pull tab remains accessible after sewing, does not catch the lining and does not interfere with other hardware.
- The locking function meets your assembly’s requirements and has been checked in its working positions.
- End stops and end finishing are agreed for the construction.
- The intended manufacturing operations leave no visible damage to the tape or coating.
Agree acceptance criteria, cycle counts and loading conditions for your own product. Do not assign an arbitrary service life or transfer one sample’s result to a different article without checking it.
Common mistakes when ordering zipper sliders
Ordering only “size five”. A number without the chain type and series leaves uncertainty. Confusing standard and reverse configurations. Establish the coil and pull-tab orientation first. Choosing an attractive handle. Pull-tab shape does not prove body compatibility. Treating a photograph as a colour standard. A production batch needs an agreed finish code and, where necessary, a physical sample. Buying components without checking the complete assembly. Confirm which sliders, stops and operations are needed for the finished zipper.
What to send your manager for a precise match
Prepare the complete chain series, existing slider code, photographs of both sides, product description, operating orientation, required locking function, colour and finish. Add the slider quantity, chain length and whether you need a sample or documentation. Mark any unknown parameter as unknown.
Example enquiry: “We need a slider for YKK 5CNF JI20 in a cover opening. Chain photographs and a sample are supplied. Please confirm the compatible configuration, locking function, pull tab and end components; sample checking is required before the batch.” This is an enquiry example, not a recommendation of a particular pair.
Choosing a YKK zipper slider starts with identifying the chain, confirming the configuration and checking the assembly before purchasing a batch. Contact a DELIM manager with these details. Availability, minimum quantities, price, documents and delivery timing are agreed for the specific enquiry.
Frequently asked questions
Will any No. 5 slider fit any No. 5 zipper?
The same number is insufficient. Check the construction, full series, operating orientation and specific slider configuration.
How can I choose a slider when the marking has worn off?
Provide photographs of both sides, measurements of the closed chain and a physical sample. If the article cannot be reliably identified, the order needs further checking.
Does a chain listing mean the slider is already included?
Do not assume so. Check the contents of the particular item and agree the sliders and end finishing separately.
For a complete zipper enquiry, read “How to prepare a zipper request”. All DELIM articles and guides.