Test Tube Caps

Autoclavable Two-part assembly For attachment to centrifuge tubes or bottles to prevent leakage during extremely high speed centrifugation. Two-part assembly consists of polypropylene screw closure and a retained silicone gasket. Caps can be written on for easy notation.

Designed for standard screw thread vials. Septa's sold separately. Specifications: Size: 8-425 Case Quantity: 1000 Color: Red  

Save time and money with vial, cap, and septa kits that arrive conveniently packaged and preassembled.

8-425 Screw Thread Caps with Inserted Septa Pre-assembled caps and septa are convenient and minimize contamination from handling Phenolic caps can be autoclaved Kim-Lok™ cap/septum assemblies feature a molded centering ring to eliminate septum movement during injection Storage cap has a solid...

Bonded closures feature clear PTFE/Silicone bonded directly to the closure without the use of glue or adhesives. These bonded closures provide a cost effective, integrated, one-piece system that eliminates costly line fallout. Closures are available in both pre-slit and non-slit designs

Blue polypropylene vented cap has a 0.22µm PTFE hydrophobic membrane to allow gas exchange while preventing contamination. They are autoclavable at 121°C. Must be used with our 70mm silicone gasket

Manufactured from red PTFE silicone. Ideal for screw thread vials. Specifications: Autoclavable Material: Ptfe Silicone Size: 10mm Septa Thickness: 0.010" Case Quantity: 1000

Manufactured from red PTFE silicone. Ideal for screw thread vials. Specifications: Autoclaveable Material: PTFE Silicone Size: 13mm Septa Thickness: 0.075" Case Quantity: 1000

18-400 CAP, PP WHT, PTFE/FMD PE

Made of polypropylene Caps are available either with or without a silicone washer between the cap and the tube to ensure a positive leakproof seal at all temperatures. Closures and tubes are both manufactured of polypropylene, providing the same coefficient of expansion. The cap features a long...

20-400 CAP, PP WHT, FMD PE LNR

Sarstedt's Push Cap is specifically designed for use with 13 mm test tubes, providing a reliable sealing solution. The cap ensures a tight fit, minimizing the risk of sample contamination or spillage. Made from durable materials, it withstands various laboratory conditions while maintaining its...

Straight Removable Hose Connection and Nylon Caps in either 9.5mm or 11mm. Synthware, Sizes: 14 and 18.

Identify samples quickly using Thermo Scientific™ Nalgene™ PPCO Low-Profile Closures for Micro Packaging Vials, offered in a variety of colors. Closures are molded of high-purity, low metal-content polypropylene copolymer (PPCO) resin—excellent for PCR reagents. Closures are...

Patented VersaCap® is leak-proof, has replaceable platinum-cured silicone gaskets, and provides the ultimate in top-connection flexibility. Open VersaCap® is compatible with a variety of adapter inserts, enabling users to quickly change the top connections of each carboy or bottle to match...

Thermo Scientific™ Nalgene Closures for Large Carboys and Bottles are made of white polypropylene (PP). Screw Closures are designed to fit only Nalgene Carboys and Bottles to provide a guaranteed leakproof system. TPE Sealing Gasket for Nalge # 2162-0530

Open top cap for use with GL screw threads. The cap combined with the CG-197 sealing ring will accommodate tubing of the listed diameter. Cap is made from PPS (polyphenylsiloxan) and will withstand temperatures up to 250°C. *** HOSE CONNECTION SOLD SEPARATELY. SEE CG-198-H ***

Phenolic Pulp/Vinyl Lined Caps are perfect for general use. The liner is made of a vinyl coating applied to high density polyethylene coated paper and then it is laminated to pulpboard. This general purpose liner is commonly used for food, beverage, medical and chemical applications packed at less...

Manufactured from red PTFE silicone. Ideal for screw thread vials. Specifications: Autoclaveable Material: PTFE Silicone Size: 8mm Sept Thickness:0.010" Case Quantity: 1000

20-410 STARLINE CAP, PP BLU

Screw threads Choice of six liners

For use with Globe Scientific's 6030 to 6059 sample tubes with external threads. These Screw Caps with O-Rings are designed to offer a secure, leak-proof seal for sample tubes, ensuring optimum sample integrity during storage or transportation. Comprising of high-quality material, they provide...

20-410 STARLINE CAP, PP NAT