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Screw Caps Internal Thread

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Securely seal your storage tubes

Preserve the integrity of your samples with Micronic screw caps

Two green internally threaded screw caps

Micronic Screw Caps for internally threaded tubes securely seal tubes for long-term sample storage at ultra-low temperatures. To meet the diverse needs of different researchers, Micronic offers a range of sealing solutions. Internally threaded tubes can be sealed with a standard screw cap, a Screw Cap Ultra, or a low profile screw cap.

The internally threaded screw caps are available for 96-well tubes with a standard or low profile (resulting in freezer space savings up to 33%), and are compatible with Micronic sample storage tubes in the following volumes: 0.50ml, 0.75ml, 1.10ml, 1.40ml and 2.00ml.

A Micronic 96-well format rack with lid of push cap tubes in freezer

Product features

Optimal seal quality

The silicon O-ring on the internally threaded screw cap provides the most optimal seal for storage at ultra-low temperatures.

Tube Compatibility

The internally threaded screw caps are compatible with 96-well (0.50ml, 0.75ml, 1.10ml ,1.40ml, and 2.00ml), 48-well (4.00ml), and 24-well (6.00ml) tubes.

Automation Friendly

The internally threaded screw caps Ultra (available in blue, yellow, light-green, red) are designed specifically for automated processes.

Resistance

The internally threaded screw caps resist chemical solvents. All caps are produced in a class 7 clean room and are RNase/DNase and Pyrogen free.

  • Material Highest purity PP with Silicon O-ring
  • Cap height 14.2 mm, 14.9 mm (48-format), 14.2 mm (24-format)
  • Temperature range Vapor phase LN2 to +100°C
  • Available sterile, gamma radiated, (15 kGy avg.) or Et0 treated
  • Available pre-capped on Micronic screw cap tubes
  • Available in 12 colors

Satisfied customers

That's why we do it

"At NBS Scientific I got quick and reliable responses to questions and appointments. All advice and attention was expertly given. We've been happily working together for over 2 years now. "

The Charles River Labs logo
Charles River Laboratories

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Want to learn more about the internally threaded screw caps? Eager to request a free sample? Contact us today with your questions.

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Product downloads

  • Caps for Sample Storage Tubes Download

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The color range of Micronic's externally threaded screw caps: grey, light green, blue, red, orange, yellow
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