Catalog Number - 95020-45S-W

The 95020-45S-W MICROSOLV Headspace Caps are a made‑to‑order screw‑top configuration designed for high‑purity headspace GC applications using 18 mm precision thread (ND18) vials. These caps combine white silicone rubber / red PTFE septa with magnetic steel caps for secure sealing and compatibility with automated systems.

With an 8 mm center hole and ND18 threading, these caps provide tool‑free sealing, consistent autosampler access, and reliable sample containment for routine to sensitive workflows.

✅ Recommended for validated methods requiring specific septa color and composition

Screw Top Design – ND18 Precision Thread

• ND18 (18 mm precision thread)

• Provides:

  • Fast, tool‑free sealing

  • Consistent closure

  • Simplified workflow

✅ Ideal for manual and automated workflows without crimping tools

Magnetic Steel Caps – Automation Compatible

• Steel caps with magnetic properties

• Enables:

  • Robotic handling

  • Autosampler compatibility

• Silver finish:

  • Clean appearance

  • Corrosion resistance

✅ Compatible with:

• Agilent® autosamplers

• PerkinElmer TurboMatrix® 16, 40, and 110

• Other magnetic‑cap headspace systems

Silicone/PTFE Septa – High Purity Performance

• White silicone rubber / red PTFE

• Provides:

  • Low extractables

  • High chemical inertness

  • Clean GC baselines

✅ Ideal for routine to sensitive headspace GC analyses

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 1.3 mm

• Provides:

  • Reduced penetration force

  • Smooth needle entry

  • Lower needle wear

✅ Improves autosampler consistency and reliability

8 mm Center Hole – Balanced Access & Seal

• Provides:

  • Reliable needle access

  • Adequate sealing surface area

• Maintains:

  • Injection consistency

  • Seal integrity

✅ Suitable for automated headspace workflows

Temperature Compatibility – Headspace Ready

• Suitable for:

  • Heated headspace GC

• Silicone/PTFE system supports:

  • Broad analytical temperature conditions

✅ Designed for high‑purity analytical environments

Designed for ND18 Headspace Vials

• Compatible with:

  • 18 mm precision thread (ND18) headspace vials

✅ Ensures:

• Proper fit

• Reproducible results

Availability

✅ Also available in case quantities:

• Case Quantity Options for 95020-45S-W Headspace Screw Caps with Silicone/PTFE Septa (1000/Case and other bulk configurations available)

Performance Positioning – Screw Top + High Purity + Automation

• Compared to butyl/PTFE:

  • ✅ Lower extractables

  • ✅ Improved chemical inertness

• Compared to crimp caps:

  • ✅ Tool‑free sealing

• Compared to non‑magnetic caps:

  • ✅ Autosampler compatibility

✅ Ideal for:

• automated GC headspace systems

• high‑purity analytical workflows

• routine to sensitive applications

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• Automated laboratory workflows

Important Usage Notes

• Designed for ND18 screw‑top vials (not crimp top)

• Magnetic caps:

  • Require compatible autosampler systems

✅ Best suited for:

• automated, high‑purity headspace GC workflows

🚨Made‑to‑Order & Pricing Information

This is a custom, made‑to‑order item.

• Please contact Customer Service for formal quotation, lead time, and ordering assistance. Classification: