Caps, Screw Top, with Soft-Guard, White Silicone Rubber / Red PTFE Pre-Slit Septa, bonded in "knurled", polypropylene, Blue Caps. For use with 9-425 mm thread, 12x32 mm autosampler vials. Soft-Guard Brand. 1000/CS
Additional Info:
The 9502S‑E‑30C‑B‑M Soft‑Guard™ Screw Caps (Case Pack) feature bonded white silicone / red PTFE pre‑slit septa integrated into a durable knurled polypropylene cap, designed for 9‑425 thread autosampler vials (12 × 32 mm).
Engineered for consistent, high‑volume laboratory operations, these caps provide low‑force needle penetration combined with reliable resealing, supporting reproducible chromatographic performance and maximum instrument uptime.
✅ MICROSOLV’s most popular pre‑slit screw caps for HPLC and LC‑MS workflows (bulk format)
Pre‑Slit Soft‑Guard™ Septa – Balanced Injection Performance
Precision pre‑slit septa design enables:
Smooth, low‑force needle penetration
Reduced septum coring
Consistent resealing across multiple injections
✅ Delivers the optimal balance between:
Injection ease
Resealing reliability
Soft‑Guard™ Technology – Reduced Coring & Increased Uptime
Bonded silicone/PTFE septa helps reduce:
Missed injections
Septum fragmentation (coring)
Autosampler downtime
✅ Improves:
Data consistency
Run‑to‑run reproducibility
Instrument productivity
Optimized Septa Specifications
Durometer: 40–50 Shore A
Thickness: 0.040 in ± 0.003 in
✅ Designed for:
Autosampler compatibility
Durability in multi‑injection, high‑throughput workflows
9‑425 Cap Format – Broad Instrument Compatibility
Fits 9‑425 thread autosampler vials
Designed for 12 × 32 mm vials
Recommended for:
Waters® Alliance systems
Waters® Acquity® systems
Other HPLC, LC‑MS, GC, and GC‑MS autosamplers
✅ Ensures secure sealing and consistent performance across platforms
Durable Polypropylene Cap Design
Knurled polypropylene construction for easy handling
Suitable for manual and automated workflows
Blue color coding for fast identification
✅ Supports efficient lab workflow and organization
Bulk Case Packaging – High‑Throughput Efficiency
1000 caps per case
Ideal for:
High‑volume analytical labs
Routine sample processing environments
Reduces:
Reordering frequency
Operational interruptions
✅ Optimized for cost savings and continuous lab operation
Performance Advantage – Most Versatile Septa Type
Compared to other septa designs:
✅ Pre‑slit (this product): Balanced penetration + reseal (most versatile)
✅ Non‑slit: Maximum reseal, higher needle force
✅ Star‑slit: Lowest penetration force, reduced resealing
✅ Preferred for general‑purpose chromatography with consistent reliability
Helpful Resources & Links
Typical Applications
HPLC analysis
LC‑MS and LC‑MS/MS workflows
GC and GC‑MS applications
Pharmaceutical QC and validation labs
Environmental and food safety testing
High‑throughput analytical laboratories
Important Usage Notes
Designed for 9‑425 thread autosampler vials (12 × 32 mm)
Ideal for routine and multi‑injection workflows
Provides optimal balance between penetration ease and resealing performance
Verify compatibility with autosampler needle type and injection parameters