Test Tube Caps

Ensure a secure and contamination-free seal on your vials with these Stoppers for Crimp Caps, N 20. Tailored to meet rigorous laboratory standards, these stoppers maintain the integrity of sensitive samples and substances during storage or transport. With their precision design, they offer reliable...

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

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

Used with Viton O-Rings and threaded outer joints for making grease-free, vacuum tight seals on 14/10 MINUM-WARE® glassware components. The 8-425 size is used on the sidearm of Hickman still head and MW-81 GC collection vial, while the 13-425 is used on the MW-56 two neck flask sidearm.

20-400 I-LOC CAP, PP WHT

20-400 CAP, PP BLK, OPN, UNLINED

Fits most 13mm glass tubes Fits most 13mm glass evacuated blood collection tubes Fits most 12mm plastic culture tubes Thumb tab for easy removal Polyethylene (LDPE) 1000 caps per sealed bag Assorted colors available These colorful snap on closures are an effective way to recap 13mm blood drawing...

38-430 STARLINE CAP, PP BLU

As part of the exceptional product range from National Scientific, this assembled vial kit is designed to meet the most rigorous scientific standards. The kit includes durable vials, expertly engineered to ensure the safe storage and transportation of sensitive materials. Each vial comes...

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

These dual position caps are produced from low density polyethylene (LDPE) and is ribbed for easy handling. The cap is specially designed to provide aerobic or anaerobic storage of culture samples. When snapped into the tube, the cap provides a leak-resistant seal. Note: Leave the cap in the loose...

Three pieced lined aluminum caps have unique metal inserts. Contents cannot be pilfered without removing cap or leaving evidence of puncture or insert. A metal tab wilt a rolled safety edge “perks up” to provide visual proof of tight seal. The caps remove quickly and easily in one piece. They fit...

Resistant to moisture vapor Chemical barrier Autoclavable Caps have excellent properties of resilience. The 14B white rubber lining material consists of homogeneous sulfur cured styrene-butadiene rubber. FDA Status complies with 21CFR 177.26, "Rubber articles intended for repeated use."

Sterile to 10 -6 SAL Non-cytotoxic, non-pyrogenic RNase/DNase Free Leakproof† when used with Nalgene Micro Packaging Vials

One piece tear-off style aluminum seal Allows for easy access to vials Fits aluminum seal finish: 13 Color: Natural 1000 seals per case

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

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