Thermo Scientific™

18mm Headspace Vials & Closures

Catalog number: C4020-18
Thermo Scientific™

18mm Headspace Vials & Closures

Catalog number: C4020-18
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.
 
Catalog Number
C4020-18
Unit Size
Pack of 125
Description
18mm Screw Top Headspace Vial
Closure Type
Screw
Color
Clear
Price (USD)
67.00
Your Price:
Availability
***
Full specifications
Quantity
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)21 mL
Base StyleRound Bottom
Volume (Metric) Total12 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)46 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable10 mL
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Screw Top Headspace Vial
Closure Type
Screw
Color
Clear
Price (USD)
69.00
Your Price:
Availability
***
Full specifications
Quantity
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)21 mL
Base StyleRound Bottom
Volume (Metric) Total21 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)76 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable20 mL
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Screw Top Headspace Vial
Closure Type
Screw
Color
Clear
Price (USD)
49.00
Your Price:
Availability
***
Full specifications
Quantity
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)12 mL
Base StyleRound Bottom
Volume (Metric) Total12 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)46 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable10 mL
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Magnetic Screw Cap, 8mm hole
Closure Type
Screw Cap (Magnetic) with Septum
Color
Blue
Price (USD)
119.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18mm Blue Silicone/Natural PTFE
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)2.0 mm
Closure Size18 mm
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 100
Description
18mm Magnetic Screw Cap, 8mm hole
Closure Type
Screw Cap (Magnetic, Open-Top)
Color
Silver
Price (USD)
33.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorSilver
MaterialSteel
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top)
Quantity125
Closure Size18 mm
Unit SizePack of 100
Catalog Number
Unit Size
Pack of 125
Description
18mm Magnetic Screw Cap, 8mm hole
Closure Type
Screw Cap (Magnetic, Open-Top) with Septum
Color
Blue
Price (USD)
75.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialChlorobutyl
Septum18 mm Molded Blue Chlorobutyl/Gray PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top) with Septum
Quantity125
Thickness (Metric)3.0 mm
Closure Size18 mm
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Magnetic Screw Cap, 8mm hole
Closure Type
Screw Cap (Magnetic, Open-Top) with Septum
Color
Blue
Price (USD)
109.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18 mm Blue Silicone/PTFE, not prefitted
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top) with Septum
Quantity125
Thickness (Metric)1.0 mm
Closure Size18 mm
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Magnetic Screw Cap, 8mm hole
Closure Type
Screw Cap (Magnetic) with Septum
Color
Silver
Price (USD)
141.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorSilver
MaterialPTFE
Septum18mm Red Silicone/Natural PTFE, high temperature
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)3.1 mm
Closure Size18 mm
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
Septum for 18mm Screw Caps
Closure Type
Septum Only
Color
Blue
Price (USD)
100.00
Your Price:
Availability
***
Full specifications
Quantity
DescriptionSeptum for 18mm Screw Caps
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Closure TypeSeptum Only
Quantity125
Thickness (Metric)1.0 mm
TypeSeptum for Closure
Closure Size18 mm
Unit SizePack of 125
Catalog Number
Unit Size
Pack of 125
Description
18mm Magnetic Screw Cap, 8mm hole, SPME
Closure Type
Screw Cap (Magnetic) with Septum
Color
Blue
Price (USD)
80.00
Your Price:
Availability
***
Full specifications
Quantity
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole, SPME
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18mm Blue Silicone/PTFE, not prefitted
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)1.0 mm
Closure Size18 mm
Unit SizePack of 125
Showing 10 of 10
Catalog NumberSpecificationsUnit SizeDescriptionClosure TypeColorPrice (USD)AvailabilityQuantity
C4020-18Full specifications
Pack of 12518mm Screw Top Headspace VialScrewClear
67.00
Your Price:
***
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)21 mL
Base StyleRound Bottom
Volume (Metric) Total12 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)46 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable10 mL
Unit SizePack of 125
20-HSVFull specifications
Pack of 12518mm Screw Top Headspace VialScrewClear
69.00
Your Price:
***
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)21 mL
Base StyleRound Bottom
Volume (Metric) Total21 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)76 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable20 mL
Unit SizePack of 125
10-HSVFull specifications
Pack of 12518mm Screw Top Headspace VialScrewClear
49.00
Your Price:
***
Description18mm Screw Top Headspace Vial
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner22.5 mm
ColorClear
Diameter (Metric) Outer22.5 mm
MaterialGlass
Volume (Metric)12 mL
Base StyleRound Bottom
Volume (Metric) Total12 mL
Vial Type18 mm Screw Top Headspace Vial
Closure TypeScrew
Height (Metric)46 mm
Quantity125
Closure Size18 mm
Marking SpotNo
Volume (Metric) Usable10 mL
Unit SizePack of 125
C4020-47Full specifications
Pack of 12518mm Magnetic Screw Cap, 8mm holeScrew Cap (Magnetic) with SeptumBlue
119.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18mm Blue Silicone/Natural PTFE
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)2.0 mm
Closure Size18 mm
Unit SizePack of 125
18-MSCFull specifications
Pack of 10018mm Magnetic Screw Cap, 8mm holeScrew Cap (Magnetic, Open-Top)Silver
33.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorSilver
MaterialSteel
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top)
Quantity125
Closure Size18 mm
Unit SizePack of 100
18-MSC-CBT3Full specifications
Pack of 12518mm Magnetic Screw Cap, 8mm holeScrew Cap (Magnetic, Open-Top) with SeptumBlue
75.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialChlorobutyl
Septum18 mm Molded Blue Chlorobutyl/Gray PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top) with Septum
Quantity125
Thickness (Metric)3.0 mm
Closure Size18 mm
Unit SizePack of 125
18-MSC-ST101Full specifications
Pack of 12518mm Magnetic Screw Cap, 8mm holeScrew Cap (Magnetic, Open-Top) with SeptumBlue
109.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18 mm Blue Silicone/PTFE, not prefitted
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic, Open-Top) with Septum
Quantity125
Thickness (Metric)1.0 mm
Closure Size18 mm
Unit SizePack of 125
18-MSC-ST3HTFull specifications
Pack of 12518mm Magnetic Screw Cap, 8mm holeScrew Cap (Magnetic) with SeptumSilver
141.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorSilver
MaterialPTFE
Septum18mm Red Silicone/Natural PTFE, high temperature
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)3.1 mm
Closure Size18 mm
Unit SizePack of 125
18-ST101Full specifications
Pack of 125Septum for 18mm Screw CapsSeptum OnlyBlue
100.00
Your Price:
***
DescriptionSeptum for 18mm Screw Caps
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Closure TypeSeptum Only
Quantity125
Thickness (Metric)1.0 mm
TypeSeptum for Closure
Closure Size18 mm
Unit SizePack of 125
C4020-48Full specifications
Pack of 12518mm Magnetic Screw Cap, 8mm hole, SPMEScrew Cap (Magnetic) with SeptumBlue
80.00
Your Price:
***
Closure ColorSilver
Description18mm Magnetic Screw Cap, 8mm hole, SPME
Diameter (Metric) Opening18 mm
Diameter (Metric) Inner18 mm
ColorBlue
MaterialPTFE
Septum18mm Blue Silicone/PTFE, not prefitted
Material (Septa)Silicone/PTFE
Closure MaterialSteel
Closure TypeScrew Cap (Magnetic) with Septum
Quantity125
Thickness (Metric)1.0 mm
Closure Size18 mm
Unit SizePack of 125
Showing 10 of 10
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.
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.

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Frequently asked questions (FAQs)

Citations & References