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Thermo Scientific™ Nalgene™ Continuous-Thread Lined Closures for Serum Vials: Sterile, Bulk Pack

Eliminate the need for a rubber stopper with the safe-sealing solution of these continuous thread lined closures for serum vials.

Manufacturer:  Thermo Scientific™ 3421580021

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Catalog No. 01-288-43

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Eliminate the need for a rubber stopper with the safe-sealing solution of high density polyetylene (HDPE) Thermo Scientific™ Nalgene™ Continuous Thread Lined Closures for Serum Vials.


  • Sterile to 10-6 SAL
  • Liner made of a low density polyethylene (LDPE) core between two facings of solid HDPE
  • Multiple closure colors available

Ordering Information:

Serum vial closures are bulk packed at 2,000 per case.



Three-ply co-extruded liner (LDPE core between two facing of solid HDPE)
14.2 mm
ISO 13485:2016
Serum vial closures
22.1 mm
Lined Continuous Thread
2000 Cases
Sterile PETG Serum Vials (Sold Separately)
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The term “leakproof” applies to Thermo Scientific Nalgene products that meet the following criteria: a) Bottle/flask/funnel closure systems with closures smaller than 100mm, after they are filled with water, inverted, withstand air pressure of 2psig for two minutes, and no water escapes;. b) Bottle/funnel/flask closure systems of larger than 100mm after they are filled with water, inverted for 15 minutes, and no water escapes. Note: these tests, using other liquids, may not yield the same results. To ensure safe usage, customers are advised to test Thermo Scientific Nalgene bottles and closures under conditions of their planned applications. Thermo Scientific Nalgene products are leakproof at ambient temperature and pressure when used with their Nalgene closures.