Home › Glossary › Luer-lock and luer-slip
What is a luer-lock syringe?
The two ways a needle attaches. Luer-lock screws on with a thread and won't pop off under pressure; luer-slip just pushes on. Filters and adapters are made for luer-lock. Full explanation →
Why it matters when you shop
The luer taper is the standard fit between a syringe tip and a needle. Luer-lock adds a threaded collar so the needle screws on and cannot pop off; luer-slip is friction only. For mixing, filtering and filling spray bottles, where you push liquid through a small hub, luer-lock is the one that stays on.
What to look for on the listing
- "Luer-lock" (or "LL") in the title for anything used with a filter or a blunt drawing needle.
- Whether a needle is included; luer syringes usually ship without one.
- Capacity: 3 mL for moving water into a vial, 10 mL for larger mixes.
Go deeper
- Guide: Luer-lock vs luer-slip syringes: which to buy
- Comparison: Luer Lock Vs Luer Slip
- Tool: Product Finder for this category
- All terms: the glossary
Products where this number appears
Insulin Syringes 31G, 0.5 mL Needle connection: fixedInsulin Syringes 31G, 0.3 mL Needle connection: fixedInsulin Syringes 30G, 1 mL Needle connection: fixedHalf-Unit Insulin Syringes, 0.3 mL Needle connection: fixedLuer-Lock Syringes, 3 mL Needle connection: luer-lock10 mL Luer-Lock Syringes Needle connection: luer-lockBlunt Fill Needles, 18G Needle connection: luer-lockLuer Needle Tips, 25–30G Needle connection: luer-lock
Reviewed 2026-09-03. Definitions describe equipment, not treatment. Affiliate links open your own country's Amazon store; your price is the same.