Catalog Number - 9504S-20C-BK

The 9504S‑20C‑BK MICROSOLV™ Screw Caps are selected for chromatography workflows requiring enhanced needle cleaning action and improved resealing performance during repeated injections. The PTFE/silicone/PTFE septa configuration was developed for compatibility with older autosampler systems where additional mechanical needle wiping is beneficial.

Manufactured with black knurled polypropylene caps and fitted multi‑layer septa, these caps are designed for use with standard 13‑425 thread, 15 × 45 mm autosampler vials. This septa configuration is commonly used with older Waters® and Shimadzu autosampler platforms that accommodate 4 mL autosampler vials.

Triple‑Layer Septa Design

• PTFE / silicone rubber / PTFE septa

• Multi‑layer sealing configuration

• Enhanced needle wiping action

• Supports improved resealing performance

✅ Improved post‑injection sealing characteristics

Legacy Instrument Compatibility

• Suitable for systems comparable to:

  • Older Waters® autosamplers

  • Older Shimadzu autosamplers

• Designed for established analytical workflows

• Useful for carryover reduction applications

✅ Optimized for legacy autosampler systems

13‑425 Thread Compatibility

• Fits 13‑425 screw thread vials

• Compatible with:

  • 15 × 45 mm autosampler vials

  • 4 mL autosampler vials

  • Industry standard autosampler formats

✅ Broad autosampler compatibility

Knurled Polypropylene Caps

• Black polypropylene construction

• Knurled exterior improves:

  • Grip

  • Installation

  • Removal

• Reliable sealing performance

✅ Convenient laboratory handling

Routine Chromatography Applications

• Suitable for:

  • HPLC analysis

  • Legacy autosampler systems

  • Carryover reduction workflows

  • Routine analytical testing

✅ Ideal for specialized chromatography workflows