CUSTOM ITEM: Caps, Screw Top, with Silicone Rubber / PTFE Pre-Slit Septa, bonded in "knurled", polypropylene, White Caps. For use with 13-425mm thread, 15x45mm autosampler vials. MICROSOLV Brand. BULK PRICING.
Additional Info:
Pre‑slit septa reduce resistance during autosampler needle entry, supporting smoother injections in systems where penetration force is a concern.
The 9504S‑30C‑W screw caps feature bonded silicone/PTFE pre‑slit septa that improve penetration performance while preventing “septa plunge” into vials during injection. The bonded design keeps the septa securely in place, reducing the risk of dislodging during transport or repeated use. These caps are commonly used with older Waters® autosamplers that utilize 15 × 45 mm (4 mL) vial formats.
The silicone/PTFE construction provides chemical resistance and reliable sealing for HPLC, GC, and LC‑MS workflows. The white polypropylene cap includes a knurled exterior for secure handling and consistent torque when sealing standard 13‑425 autosampler vials.
Key Features & Benefits
Pre‑slit septa ✅ Easier needle penetration
Bonded septa design ✅ Prevents septa plunge and dislodging
Silicone/PTFE construction ✅ Chemical resistance and sealing performance
Fits 15 × 45 mm (4 mL) autosampler vials ✅ Standard 13‑425 compatibility
White knurled cap ✅ Secure handling and clean appearance
Typical Applications
HPLC and UHPLC analysis
LC‑MS and GC‑MS workflows
Older Waters® autosampler systems
Higher volume vial applications
Important Notes
For 13‑425, 15 × 45 mm (4 mL) autosampler vials only
Suitable for multiple injections
Bonded pre‑slit septa—no assembly required
Designed for legacy autosampler compatibility
This and other custom items are Custom Ordered and require quotation
Additional Resources
Custom Item Pricing Information