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Lab notes

Luer lock vs. slip tip syringes: what's the difference?

PepPro Supply Lab Notes · Research use only

The fitting where a needle or transfer tip attaches to a syringe barrel comes in two common styles, and the difference affects how securely the two pieces stay connected during use.

Luer lock

A luer lock fitting uses a threaded collar that screws the needle or tip onto the syringe barrel. This creates a more secure connection that resists separation under pressure, which is useful for transfers involving thicker liquids or higher dispensing pressure.

Slip tip

A slip tip (or "luer slip") fitting simply pushes on and holds by friction, without threading. It's quicker to attach and detach, which suits fast, low-pressure, general liquid dispensing tasks where a secure locking connection isn't essential.

Which to choose for general lab and industrial use

For higher-precision or higher-pressure dispensing work, luer lock is the more reliable choice. For quick, general-purpose liquid transfer and measuring tasks, slip tip syringes are simpler and faster to work with, at the tradeoff of a less secure fitting.

This article is for laboratory research reference only. Products discussed are for in vitro laboratory research use only and are not evaluated or approved for human or veterinary use.