Luer plugs

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Luer Fittings

Luer Fittings

Nordson MEDICAL offers designers worldwide the broadest selection of male luer and female luer fittings and connectors, luer adapters and luer accessories. Over 120 separate configurations are offered in nylon, polypropylene, polycarbonate and PVDF, with many color and special material options available from stock or upon special order. Our male and female luers are available with tubing connections that fit many tubing materials ranging from 1/16" (1.6 mm) to 1/4" (6.4 mm) IDs, with threaded ends and panel mount versions also available.

Nordson MEDICAL's luer fittings are part of a standardized system of small-scale tubing connectors used to make secure leak-proof unions in medical devices and laboratory instruments. The special 6% of a luer fitting provides a unique secure friction seal appropriate for gas and fluid connections. The Nordson MEDICAL barb (on luer fittings featuring a barbed tubing connection) has no parting lines on the barb to ensure a leak-free tubing union.

Broadest Luer Fittings Selection Online

Our Online Store offers the broadest selection of luer fittings and connectors in the industry.

  • 120+ luer configurations
  • Available in nylon, polypropylene, polycarbonate, polyvinylidene fluoride (PVDF), and other materials by special order
  • Many color options
  • Tubing connections ranging from 1/16" (1.6 mm) to 1/4" (6.4 mm) IDs
  • Threaded ends and panel-mount versions
  • Conform to ISO-594-1 and ISO 594-2 standards
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Luer Locks & Luer Slips

The two main categories of luer fittings are luer locks and luer slips:

  • Luer-lock connectors (female) are joined by means of a tabbed hub on the female fitting that screws into threads in a sleeve on the male fitting and attaches securely. Male luer lock connectors are available with integral lock rings or with rotatable features to allow you to position the tubing before assembly. This locking mechanism is used for applications that require a secure connection.
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  • Luer-slip connectors simply conform to luer taper dimensions and are pressed together and held by friction (they have no threads). This mechanism is used for applications such as priming and flushing.
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Luer Tapers

The 6% tapered cone luer standard was developed in 1896. The first standard for luer applications for plastic products was published in 1955. Because the standard is understood worldwide and results in economical, reliable and inexpensive components, it is employed in thousands of medical devices worldwide.

ISO 594-1 and ISO 594-2 Standard Luers

All Nordson MEDICAL luer locks, adapters and accessories are made to the ISO-594-1 and ISO 594-2 standards, and may be connected to other luer fittings meeting these ISO standards. If your application requires mating components from multiple suppliers, please test your application to verify the performance of the interconnection as other manufacturers' products may not meet the international standard.


Luer taper

A syringe with a male Luer-Lock fitting, and a needle with female Luer-Lock fitting (purple) which screws into it

The Luer taper is a standardized system of small-scale fluid fittings used for making leak-free connections between a male-taper fitting and its mating female part on medical and laboratory instruments, including hypodermicsyringe tips and needles or stopcocks and needles. Currently ISO 80369 governs the Luer standards and testing methods.[1]

Invented by Karl Schneider[2] and named after the 19th-century German medical instrument maker Hermann Wülfing Lüer, it originated as a 6% taper fitting for glass bottle stoppers (so one side is at 1.72 degrees to the centerline). Key features of Luer taper connectors are defined in the ISO 594 standards.[3] It is also defined in the DIN and EN standard 1707:1996[4] and 20594-1:1993.[5]


There are two varieties of Luer taper connections: locking and slipping.[6] Their trade names are confusingly similar to the nonproprietary names. "Luer-Lock" and "Luer-slip" are registered trademarks of Becton Dickinson. "Luer-Lock" style connectors are often generically referred to as "Luer lock", and "Luer-slip" style connectors may be generically referred to as "slip tip". Luer lock fittings are securely joined by means of a tabbed hub on the female fitting which screws into threads in a sleeve on the male fitting. The Luer lock fitting was developed in the United States by Fairleigh S. Dickinson. 'Luer lock' style connectors are divided into two types "one piece luer lock" and "two piece luer lock" or "rotating collar luer lock". One piece Luer lock comes as a single mold, and locking is achieved by rotating the entire luer connector or system. In two piece luer lock, a free rotating collar with threads is assembled to the luer and the locking is achieved by rotating the collar.

Slip tip (Luer-slip) fittings simply conform to Luer taper dimensions and are pressed together and held by friction (they have no threads). Luer components are manufactured from either metal or plastic and are available from many companies worldwide.


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Qosina is your source for bulk, non-sterile medical luer lock connectors in different sizes, colors and materials.

Single-Use Medical Luer Connectors

Non-sterile medical luer lock connectors are available with male luer and female luer fittings. Connector configurations include male luer locks, male luer slips, female luer locks, and female luer slips that connect to tubing in a wide selection of sizes. Qosina also stocks vented and non-vented luer lock caps.

Downloadable Resources

Whatever luer lock connection you’re searching for, we can help keep your project on track. Use our 3D CAD files to implement components into your team’s virtual designs and stay up to date on government and safety regulations. Our CAD files are available in a variety of formats to help your engineers adapt drawings and share visuals with non-technical team members. You’ll also find other downloadable resources on each product page, like material and safety data sheets (MSDS), technical data sheets, material certification, and compatibility information.

Thousands of Stock Connectors

Qosina is a leading medical device component supplier of disposable OEM components to the medical and pharmaceutical industries. When you purchase from Qosina, you keep your project on track by eliminating tooling costs and getting immediate delivery of single-use medical components from our inventory.

Save time and money with in-stock solutions from our ISO 9001, ISO 13485, and ISO 14001 registered facility. Our full-line catalog features thousands of connectors, including male and female luer locks with full-color images on a one-centimeter grid. If you can’t find the luer lock connectors that your project requires, contact us about custom sourcing female luer locks or other connectors to your exact specifications. Altering an existing mold is a fast and cost-effective way to adjust size, color, or material, and our product development team is eager to work with you to find the best solution.

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