Fisherbrand Centrifuge Tube 2 ml with Screw Cap Free Standing 500 Tubes

Fisherbrand 02-681-374 Microcentrifuge Tube – 2 mL, Tethered Screw Cap, Free-Standing, Sterile

The Fisherbrand 02-681-374 is a highly durable 2 mL microcentrifuge tube engineered specifically for rigorous laboratory applications, including long-term cryogenic storage, rigorous vortexing, and bead-beating homogenizations. Manufactured from high-clarity virgin polypropylene, this tube features a flat, skirted base that allows it to stand independently on a workbench, freeing up the user's other hand for precision pipetting. The integrated tethered screw cap is equipped with a premium internal O-ring, guaranteeing a positive, leak-proof seal that prevents evaporation during thermal cycling or boiling. Supplied sterile and certified free of RNase and DNase, it is the ultimate vessel for protecting your most valuable molecular, genomic, and cellular samples.

Technical Performance and Design

• Tethered O-Ring Screw Cap: The securely attached cap prevents technicians from accidentally dropping, misplacing, or cross-contaminating lids during high-throughput processing. The internal O-ring ensures an absolute seal, actively preventing hazardous aerosols from escaping and protecting the sample from external contamination.

• Free-Standing (Skirted) Base: The wide, flat skirt allows the tube to stand upright and stable on any flat surface. This completely eliminates the constant need to transfer tubes in and out of bulky racks, accelerating one-handed liquid handling and sample preparation.

• High Centrifugal Stability: Built with a robust, reinforced wall construction that effortlessly withstands extreme centrifugal forces up to 18,000 x g, ensuring the tube will not shatter or warp during the hard-pelleting of dense biological suspensions.

• Extreme Temperature Tolerance: The superior O-ring seal and polypropylene resin allow these tubes to be safely submerged in the vapor phase of liquid nitrogen for cryogenic biobanking, or heated in a boiling water bath without popping open.

Product Specifications

• Catalog Number: 02-681-374

• Product Line: Fisherbrand

• Maximum Volume: 2.0 mL

• Material: Virgin Polypropylene

• Cap Type: Attached (Tethered) Screw Cap with O-Ring

• Bottom Geometry: Skirted (Self-Standing / Free-Standing)

• Sterility: Sterile (RNase-Free, DNase-Free)

• Packaging: Bulk packaged (Typically 500 per pack)

Key Benefits & Applications

• Tissue Homogenization (Bead Beating): Standard snap-cap tubes often burst open under the intense kinetic force of tissue homogenizers. The threaded screw cap and O-ring ensure your lysis buffers and samples remain securely contained during rigorous mechanical disruption.

• Aseptic Workflow Efficiency: The tethered cap design is highly preferred in biological safety cabinets, as operators do not have to put the cap down on a potentially contaminated surface while pipetting.

• Secure Biobanking: The absolute ideal vessel for storing master cell banks, expensive enzymes, and purified DNA/RNA libraries in ultra-low -80°C freezers.

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