8mm Screw Cap with Septa, 8-425

8 425 black cap1
8 425 black cap9
8 425 black cap8
8 425 black cap7
8 425 black cap6
8 425 black cap5
8 425 black cap3

1) Basic Information

Product Name 8mm Screw Cap with Septa, 8-425
Cap Material PP
Cap Thread

8-425
Cap Color Black/White
Septa PTFE/Silicone
Septa thickness  1.5mm
Application For LC/GC
Packaging 100 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

Packaging

 
COBN-0802WR8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + White PTFE/Red Silicone Septa1008 425 black cap6
COBP-0802WR8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + White PTFE/Red Silicone Septa, Pre-slit1008 425 black cap6
COBN-0802RW8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa1008 425 black cap8
COWP-0802RW8mm White Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa1008 425 black cap5
COBP-0802RW8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole + Red PTFE/white Silicone Septa,Pre-slit1008 425 black cap8
CNBN-0802RW8mm Black Screw Polypropylene Cap without Hole + Red PTFE/white Silicone Septa1008 425 black cap7
CNWN-0802RW8mm White Screw Polypropylene Cap without Hole + Red PTFE/white Silicone Septa100 
COBN-0802BW8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole  + Blue PTFE/white Silicone Septa,Pre-slit1008 425 black cap2
COBN-0802RWR8mm Black Screw Polypropylene Cap, 5.5mm Centre Hole  + Red PTFE/white Silicone/red PTFE Septa1008 425 black cap3
CNBN-0802PE8mm Black Screw Polypropylene Cap without Hole + PE Septa100 
CNWN-0802PE8mm White Screw Polypropylene Cap without Hole + PE Septa100 
CNBN-0802AL8mm Black Screw Polypropylene Cap without Hole + Aluminum Septa100