Test Tube Caps

For pharmaceuticals, specialty chemicals and food ingredients, this jar lid protects your valuable products from moisture, from contamination, and against tampering, ensuring your hazardous solids arrive safely at their destination. The quarter-turn screw lid closure reduces handling time.

For use with Globe Scientific's 6030 to 6059 sample tubes with external threads. Globe Scientific presents the innovative solution for secure sample storage with their Screw Caps for Sample Tubes. Made with precision and high-quality materials, these caps provide an optimal seal to prevent leakage...

Dropper Assemblies feature a glass tube with black polypropylene closure and rubber squeeze bulb. The opening of tube tip has a 3.0mm outside diameter. These dropper caps are available in multiple sizes with dropper tubes in multiple lengths.

MicroLiter 20mm crimp top seals are available in multiple colors and septa types.

Innovative flanged-thread design allows cap to descend into the tube until a friction fit is secure and plug is stationary Fit tubes with 12 to 16 mm diameter Hollow top finish with ribs for easy retrieval

Economical general purpose cap/liner combination Good chemical resistance to mild acids, alkalis, alcohols, aqueous solutions, oils and solvents Not autoclavable Specially formulated phenolic cap material Polyvinyl-faced pulpboard liner

Available in multiple colors and package sizes. Ideal for use in demanding laboratory environments, these 9mm Screwthread Autosampler Vial Caps offer reliable sealing performance and high chemical resistance. Constructed with PTFE/Silicone/PTFE Septa, they ensure a secure and leak-proof seal,...

Pulp/Vinyl Lined Polypropylene Caps are commonly used for food, beverage, medical and chemical applications packed at less than 120° F., including mild acids, alkalis, solvents, alcohols, oils and aqueous products. Polypropylene caps are known for good impact strength, durability, cost...

20-400 I-LOC CAP, PP YLW

SAFE® 24 External Thread Screwcaps for XXLX 2000, XXLX 4000, XXLX 6000 and XXLX 8000 (External Thread) Purple Bulk Beta Sterile Large Case, 1200 Caps per case

Features large knurls for ergonomic handling Contains hydrophobic membrane for applications requiring gas exchange Sterilized by gamma radiationDoes not fit 490cm² roller bottles .

Black phenolic screw cap 14B Rubber lined caps feature a nontoxic white styrene- butadiene rubber liner ideal for cell culture work GPI thread: 8mm-425 Autoclavable Case of 1000

Pre-assembled closure and septa minimize contamination from handling. Enhance your laboratory's precision and efficiency with the Chemglass Preassembled GPI 10-425 Septa Caps. These high-quality caps are designed to provide a secure seal, safeguarding your valuable samples and substances. Engineered...

Tip made of LDPE (Low Density Polyethylene) Extended controlled dropper tip dispenses one drop at a time Average drop size is 44uL

MicroLiter offers products for both LC and GC applications. Ensuring the integrity of your samples is paramount in every scientific experiment. With the 11mm Snap Caps that come with an integrated PTFE Septa, contamination is a thing of the past. These caps provide a secure fit for your vials,...

The Finneran solid top cap is used with vials to ensure tight sealing of the stored sample. It is mainly used in research laboratories or in chemical industries. This cap is made of sturdy polypropylene material which ensures long lasting usage and durability.

ChemoPlus™ IVA seals for bottles and vials are sterile seals that protect point of entry of IV admixtures from contamination and accidental double dosing. Packaging is USP 797 compliant. Liner, dispenser and core are non-linting and can easily be wiped down. They have a dual warning system in...

O-Rings for Nalge # DS3132-series Sealing Caps

Excellent for Culture Tube and Flask Closures. 305 Stainless Steel, Non-Corroding. Lanced fingers grip firmly after repeated autoclaving.

National Scientific brings to you this highly robust, 9mm black cap screw, an essential item in every scientific laboratory. Designed to ensure a tight seal on your bottles, this cap screw is instrumental in preventing leakage and contamination of samples. With its 9mm size, it can easily fit a...

Screw Caps for External Threaded 2D SAFE® Tubes, Cap Rack, Purple, Non-Sterile

As part of the prestigious National Scientific brand, our black 11mm snap caps are expertly designed to offer convenience and security for scientific applications. Crafted for durability and reliability, these caps provide an effortless snap-on feature, ensuring easy application and removal without...

Caps fit Corning media bottles, Erlenmeyer flasks and spinner flasks with standard GL threads. Standard Plug Seal Caps are autoclavable and use a linerless plug seal design for efficient sealing. Pouring Rings fit on the lips of bottles for drip-free pouring. Autoclavable Vented Caps have a 0.22...

Made of polyethylene These caps have two flexible flanges to ensure a leakproof seal. They will fit into test tubes and also in round cuvettes and centrifuge tubes.