Catalog Number - 95020-45S-W-K

The 95020-45S-W-K MICROSOLV Headspace Caps are designed for high‑volume headspace GC workflows, combining white silicone rubber / red PTFE septa with magnetic steel screw caps for secure sealing and autosampler compatibility.

Supplied in a 1000‑count case, these caps provide efficient inventory management, reduced ordering frequency, and consistent performance. Designed with ND18 screw threads and an 8 mm center hole, they enable tool‑free sealing and dependable autosampler operation.

Bulk Case Format – High Throughput Efficiency

• ✅ 1000 caps per case

• Designed for:

  • High‑volume laboratories

  • Production environments

  • Reduced reordering frequency

✅ Improves operational efficiency and cost control

✅ Also available in smaller quantities:

• Smaller Pack Quantity Options for 95020-45S-W-K Headspace Screw Caps with Silicone/PTFE Septa (100/Pack configuration available) for Custom Pricing.

Screw Top Design – ND18 Precision Thread

• ND18 (18 mm precision thread)

• Provides:

  • Tool‑free sealing

  • Consistent closure torque

  • Faster sample prep

✅ Ideal for manual and automated workflows

Magnetic Steel Caps – Automation Compatible

• Steel caps with magnetic properties

• Enables:

  • Robotic handling

  • Autosampler integration

• Silver finish:

  • Clean identification

  • Corrosion resistance

✅ Compatible with:

• Agilent® headspace systems

• PerkinElmer TurboMatrix® 16, 40, and 110

• Other magnetic‑cap autosamplers

Silicone/PTFE Septa – High Purity Performance

• White silicone rubber / red PTFE

• Provides:

  • Low extractables

  • High chemical inertness

  • Clean chromatographic baselines

✅ Ideal for routine to sensitive headspace GC analyses

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A

• Septa thickness: 1.3 mm

• Provides:

  • Reduced penetration force

  • Smooth needle entry

  • Lower needle wear

✅ Improves autosampler performance and reproducibility

8 mm Center Hole – Balanced Access & Seal Integrity

• Provides:

  • Reliable needle access

  • Adequate sealing surface

✅ Ensures consistent injections and sealing performance

Temperature Compatibility – Headspace Ready

• Suitable for:

  • Heated headspace GC

• Silicone/PTFE design supports:

  • Broad analytical temperature ranges

✅ Designed for high‑purity workflows

Designed for ND18 Headspace Vials

• Compatible with:

  • 18 mm precision thread (ND18) headspace vials

✅ Ensures:

• Proper fit

• Reproducible analytical performance

Performance Positioning – Bulk + High Purity + Automation

• Compared to smaller packs:

  • ✅ Lower cost per unit

• Compared to butyl/PTFE:

  • ✅ Lower bleed / higher purity

• Compared to crimp caps:

  • ✅ Faster sealing (no tools required)

• Compared to non‑magnetic caps:

  • ✅ Fully autosampler compatible

✅ Ideal for:

• high‑throughput labs

• automated GC headspace systems

• high‑purity analytical methods

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• High‑volume automated workflows

Important Usage Notes

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

• Magnetic caps:

  • Require compatible autosampler systems

• No crimping tool required

✅ Best suited for:

• high‑volume, automated, high‑purity workflows