8mm Screw Caps with Septa (8-425)

8mm Screw Cap with Septa, 8-425

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1) Basic Information

Product Name8mm Screw Cap with Septa, 8-425
Cap MaterialPP
Cap Thread8-425
Cap ColorBlack/White
SeptaPTFE/Silicone
Septa thickness1.5mm
ApplicationFor LC/GC
Packaging100 pcs Packed in one Bag

2） Product Overview

These Caps&Septas are custom-made for 2 mL 8-425 autosampler vials, fitted with integrated PTFE/silicone septa. Perfect for high-precision lab analytical testing.

Constructed from premium raw materials, these caps feature outstanding chemical inertness and superior sealing performance. They effectively stop sample contamination and analyte volatilization to guarantee accurate test results.

Widely applicable to HPLC, GC and other chromatographic analysis, they fully satisfy strict lab standards for sample handling. Simple to use and highly compatible with mainstream equipment, they deliver reliable performance for scientific research and quality control.

 

3） Key Features

  • Professional quality control team stabilizes batch production consistency
  • Certificate of Analysis (CoA) supplied with every shipment
  • Standard open-top design for HPLC autosamplers; compatible with Shimadzu, Varian, Gilson and more instruments
  • Individual test certificates included for all cap orders to verify full specification compliance
  • Standard threaded PP caps engineered for 2 mL autosampler vials
  • Pre-assembled cap & septum units lower contamination risks during sample preparation
  • Sealed PE bag packaging keeps caps clean and free of impurities before use
  • Custom OEM labeling service supported

4) Applications

HPLC & GC Autosampler Analysis

Open-top caps are designed for high-throughput automatic sample testing. The structure allows autosampler needles to pierce the septum directly for sample extraction without manual cap removal, greatly boosting testing efficiency and data accuracy.
For labs running high-volume sample batches, matching open-top caps with autosamplers dramatically improves sample processing speed and testing repeatability, while minimizing human operational errors.
 

5）Ordering Information

P/N

Description

PackImage
P020018mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + White PTFE/Red Silicone Septa1008 425 black cap6
P020028mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + White PTFE/Red Silicone Septa, Pre-slit1008 425 black cap6
P020038mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa1008 425 black cap8
P020048mm White Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa1008 425 black cap5
P020058mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa,Pre-slit1008 425 black cap8
P020068mm Black Screw Polypropylene Cap without Hole + Red PTFE/white Silicone Septa1008 425 black cap7
P020078mm White Screw Polypropylene Cap without Hole + Red PTFE/white Silicone Septa100 
P020088mm Black Screw Polypropylene Cap, 5.5mm Centre Hole  + Blue PTFE/white Silicone Septa,Pre-slit1008 425 black cap2
P020098mm Black Screw Polypropylene Cap, 5.5mm Centre Hole  + Red PTFE/white Silicone/red PTFE Septa1008 425 black cap3
P020108mm Black Screw Polypropylene Cap without Hole + PE Septa100 
P020118mm White Screw Polypropylene Cap without Hole + PE Septa100 
P020128mm Black Screw Polypropylene Cap without Hole + Aluminum Septa100