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Luer-Lock Syringes 3 mL
Sterile 3 mL syringes with threaded luer-lock tip, needle not included
Supplied for laboratory research use only. Not for human or veterinary use, and not intended to diagnose, treat, cure or prevent any disease.
Overview
These are 3 mL sterile single-use syringes with a threaded luer-lock tip. The luer-lock design is the reason they belong in a reconstitution workflow rather than the more common slip-tip: the threaded collar screws onto a matching needle hub or filter housing and holds it there under pressure. A slip tip relies on friction alone, and friction is exactly what fails when you push liquid through a 0.22 µm membrane and back-pressure rises.
At 3 mL, the barrel is sized for the diluent side of peptide work — drawing bacteriostatic water from a 10 mL or 30 mL vial and delivering a measured volume into a lyophilized peptide vial in a single controlled push. Graduations at 0.1 mL suit that job well. They are not intended for measuring the small volumes drawn from a reconstituted vial afterwards; a 1 mL insulin-style syringe graduated in 0.01 mL increments is the right tool there, and most benches keep both.
Questions about Luer-Lock Syringes 3 mL
Do these syringes come with needles?
No. They are supplied as barrels with a threaded luer-lock tip, and needles are attached separately. This is deliberate — the same syringe can take a drawing needle, a fine dispensing needle or a 0.22 µm syringe filter depending on the step, which a fixed-needle syringe cannot.
What is the difference between luer-lock and luer-slip?
Both use the same standard 6% taper, so any needle fits either. Luer-slip relies on friction; luer-lock adds a threaded collar that mechanically captures the needle hub. Under back-pressure — filtration, fine needles, viscous solutions — a slip fitting can separate, which is why filtration work uses luer-lock.
Can I use a 3 mL syringe to draw from a reconstituted peptide vial?
It works, but it is the wrong tool for precision. Graduations here are 0.1 mL, and syringe accuracy is worst in the bottom fifth of the scale. Small measured withdrawals belong in a 1 mL insulin-style syringe with 0.01 mL graduations; the 3 mL barrel is for the diluent side.
Are they sterile, and can they be reused?
They are sterile as packaged and strictly single-use. The elastomer plunger seal is not built to survive autoclaving, and reuse after liquid contact risks carry-over between preparations that will confound analytical results. Discard any syringe whose blister wrapper is torn or previously opened.
Will these fit standard 0.22 µm syringe filters?
Yes, provided the filter housing has a luer-lock inlet, which most laboratory filters do. Check before use — a luer-slip filter will seat on the taper but will not thread, and that is precisely the situation where filtration back-pressure can push the fitting apart.
Which pack size should I order?
Packs of 10 suit occasional reconstitution or a single short study. The box of 100 is the better value per unit for a bench running regular preparations, and having plenty on hand discourages the false economy of reusing a syringe between vials.
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