13mm Screw Cap with Septa, 13-425

1) Basic Information

Product Name	13mm Screw Cap with Septa, 13-425
Cap Material	PP
Cap Thread	13-425
Cap Color	Black/White
Septa	PTFE/Silicone
Septa thickness	1.2mm
Application	For LC/GC
Packaging	100 pcs Packed in one Bag

2） Product Overview

These Caps&Septas are custom-made for 4 mL 13-425 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 4 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	Pack Of	Image
COBN-1304WR	13mm Black Screw Polypropylene Cap, 8.5mm Centre Hole+ White PTFE/red Silicone Septa	100
COBN-1304RW	13mm Black Screw Polypropylene Cap, 8.5mm Centre Hole + Red PTFE/white Silicone Septa	100
COBP-1304RW	13mm Black Screw Polypropylene Cap, 8.5mm Centre Hole + Red PTFE/white Silicone Septa，Pre-slit	100
COBP-1304BW	13mm Black Screw Polypropylene Cap, 8.5mm Centre Hole + Blue PTFE/white Silicone Septa，Pre-slit	100
CNBN-1304RW	13mm Black Screw Polypropylene Cap, Without Hole + Red PTFE/white Silicone Septa	100
CNWN-1304RW	13mm White Screw Polypropylene Cap, Without Hole + Red PTFE/white Silicone Septa	100
CNBN-1304NN	13mm Black Screw Polypropylene Cap, Without Hole + Nature PTFE/nature Silicone Septa	100
CNWN-1304NN	13mm White Screw Polypropylene Cap, Without Hole + Nature PTFE/nature Silicone Septa	100
CNBN-1304PE	13mm Black Screw Polypropylene Cap, Without Hole + PE Septa	100
CNWN-1304PE	13mm White Screw Polypropylene Cap, Without Hole + PE Septa	100
CNBN-1304NNB	13mm Black Screw Polypropylene Cap, Without Hole + Nature PTFE/nature Silicone Septa,Bonded	100
CNWN-1304NNB	13mm White Screw Polypropylene Cap, Without Hole + Nature PTFE/nature Silicone Septa,Bonded	100