Thermo Scientific™ 18mm Headspace Vials & Closures

Vials are available in 10mL and 20mL usable volumes with screw thread closure styles that require no tools for closure.

Catalog Number	Mfr. No.	Description	Closure Type	Color
03-341-957	Thermo Scientific™ 18MSC	18mm Magnetic Screw Cap, 8mm hole	Screw Cap (Magnetic, Open-Top)	Silver
03-341-961	Thermo Scientific™ 18MSCCBT3	18mm Magnetic Screw Cap, 8mm hole	Screw Cap (Magnetic, Open-Top) with Septum	Blue, Gray, Silver
03-341-962	Thermo Scientific™ 18MSCST101	18mm Magnetic Screw Cap, 8mm hole	Screw Cap (Magnetic, Open-Top) with Septum	Blue, Silver
03-341-959	Thermo Scientific™ 18ST101	Septum for 18mm Screw Caps	Septum Only	Blue
03-378-501	Thermo Scientific™ C402018	18mm Screw Top Headspace Vial	Screw Cap	Clear
14-824-365	Thermo Scientific™ 20HSV	18mm Screw Top Headspace Vial	Screw Cap	Clear
03-341-956	Thermo Scientific™ 10HSV	18mm Screw Top Headspace Vial	Screw Cap	Clear
03-378-621	Thermo Scientific™ C402047	18mm Magnetic Screw Cap, 8mm hole	Screw Cap (Magnetic) with Septum	Blue, Silver
13-622-309	Thermo Scientific™ 18MSCST3HT	18mm Magnetic Screw Cap, 8mm hole	Screw Cap (Magnetic) with Septum	Silver, Red
03-378-620	Thermo Scientific™ C402048	18mm Magnetic Screw Cap, 8mm hole, SPME	Screw Cap (Magnetic) with Septum	Blue, Silver

Description

Unlike crimp cap vials, Thermo Scientific™ National 18mm Screw Top Headspace Vials require no tools for closure. Manufactured with superior quality (Type 1, Class A) glass, they are available with a round bottom in sizes with usable volumes of 10mL or 20mL. The 18mm vials feature Magnetic Screw Caps which enable magnetic pick up in autosamplers with that capability. Multiple turn threading maintains a tight seal through extreme heating cycles. Septa are Blue Silicone/ PTFE.

Choose septa materials to meet your needs.

• Gray Butyl Stoppers are an economical septum for lower temperature (125°C) or low-pressure applications.
• Gray PTFE/Red Rubber Septa are an economical choice where a PTFE barrier is desired. 
• PTFE/White Silicone PurePack Septa for general volatiles analysis. 
• Gray PTFE/Molded Black Butyl Septa offer a more positive seal against loss of fixed gases.
• PTFE/Blue High Purity Silicone Septum reduces background from extractables or outgassing of volatile contaminants. 
• The Black Rubber septum is an economical choice for applications where reduced levels of vapor penetration are desired.

Unassembled convenience kits

National and Chromacol Headspace Unassembled Convenience Kits save time during sample preparation and include matched quantities of vials and silver aluminum seals with prefitted septa for added convenience.

Specifications

• Closure Size: 18 mm

Limited warranty period: Subject to all warranty requirements and exclusions set out in our Terms and Conditions of Sale, this product is warranted from the date we ship the product and for ninety (90) days thereafter. Disclaimer to internal research use restriction: Any restrictions on the purchaser to utilize the product(s) for internal research purposes only does not apply to the product(s) on the web pages associated with this statement.