CUSTOM ITEM: Caps, Crimp Top, with White Silicone Rubber / Red PTFE Pre-Slit Septa, Silver Caps, with a 4mm center hole. For use with 8mm Vials. MICROSOLV Brand. 100/PK. BULK PRICING.
Additional Info:
The 9508C-30T-S MICROSOLV Crimp Caps are designed for 8 mm serum finish autosampler vials, featuring a 4 mm center hole combined with a pre‑slit silicone rubber/PTFE septum for easy autosampler needle access and reduced penetration resistance.
Each cap is fitted with an ultra‑clean, pre‑slit silicone/PTFE septum (1.3 mm thick), delivering excellent chemical resistance and consistent injection performance for HPLC, GC, and LC‑MS workflows.
4 mm Center Hole – Optimized Needle Access
Open center design allows:
Smooth needle entry
Reduced septa stress
Enhances:
Injection consistency
Autosampler performance
✅ Ideal for automated chromatography systems
Pre‑Slit Silicone/PTFE Septa – Reduced Penetration Force
White silicone / red PTFE composition
Pre‑slit for easier needle penetration
Reduces:
Needle resistance
Septa coring
Particle generation
✅ Ensures smooth, repeatable injections
Tradeoff – Resealing vs. Ease of Use
Pre‑slit septa:
Improve penetration ease
Reduce needle wear
May:
Provide slightly less resealing than non‑pre‑slit designs
✅ Best for high‑throughput or sensitive autosampler systems
Ultra‑Clean Construction – Low Background Interference
Silicone/PTFE septa designed to minimize:
Extractables
Leachables
Thickness: 1.3 mm
✅ Supports clean baselines and accurate results
Crimp Top Design – Secure Seal Integrity
8 mm aluminum crimp cap
Provides:
Airtight sealing
Reduced evaporation
Reliable sample containment
✅ Suitable for volatile and non‑volatile samples
Designed for 8 mm Serum Finish Vials
Compatible with:
8 mm crimp‑top autosampler vials
Ensures:
Proper fit
Consistent sealing
✅ Enables reliable chromatography performance
Durable Aluminum Construction
Silver aluminum caps
Ensures:
Uniform crimping
Strong mechanical seal
Consistent results
✅ Suitable for routine and high‑volume workflows
Typical Applications
HPLC autosampler workflows
GC analysis
LC‑MS sample preparation
High‑throughput analytical labs
Pharmaceutical and environmental testing
Important Usage Notes
Requires 8 mm crimping tool for proper installation
Pre‑slit septa:
Improve injection ease
May slightly reduce resealing performance
Designed for 8 mm serum finish vials only
Made‑to‑Order & Pricing Information
This is a custom, made‑to‑order item.