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. 1000/CS.
Additional Info:
Pre‑slit septa reduce resistance during autosampler needle entry, helping improve injection consistency in systems where smooth penetration is required.
The 9504S‑30C‑W‑K screw caps feature bonded silicone/PTFE pre‑slit septa that enhance penetration performance while preventing “septa plunge” into vials during injection. This bonded construction keeps the septa securely in place, reducing the risk of dislodging during handling or repeated use. These caps are commonly used with older Waters® autosamplers designed for 15 × 45 mm (4 mL) vial formats.
The silicone/PTFE septa provide chemical resistance and reliable sealing across 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 consistent sealing
Typical Applications
HPLC and UHPLC analysis
LC‑MS and GC‑MS workflows
Older Waters® autosampler systems
High‑volume analytical laboratories
Important Notes
For 13‑425, 15 × 45 mm (4 mL) autosampler vials only
Suitable for multiple injections
Bonded pre‑slit septa—no assembly required
Case quantity format (1000/CS)