CUSTOM ITEM: Caps, Screw Top, with Soft-Guard, White Silicone Rubber / Red PTFE Pre-Slit (X Shape) Septa, fitted in "knurled", polypropylene, Natural Caps. For use with 9-425mm thread, 12x32mm autosampler vials. Soft-Guard Brand. BULK PRICING.
Additional Info:
X‑shaped pre‑slit septa provide a larger target area for autosampler needles, helping guide needle entry and reduce insertion resistance in demanding workflows.
The 9502S‑E‑3XN Soft‑Guard™ Screw Caps utilize an X‑slit PTFE/silicone septum that allows easier penetration compared to single-slit designs, though with reduced resealing capability. These caps are often selected for systems such as Waters® Alliance and Acquity where precise needle targeting is beneficial.
Soft‑Guard™ silicone formulation reduces coring while maintaining flexibility during use. The bonded PTFE layer provides chemical resistance and protects sample integrity across HPLC, GC, LC‑MS, and GC‑MS applications. The natural polypropylene cap features a knurled exterior for secure grip and consistent torque on standard 9‑425, 12 × 32 mm autosampler vials.
Key Features & Benefits
X‑shape pre‑slit septa ✅ Larger needle target area, easier penetration
Reduced coring silicone formulation ✅ Maintains septa integrity
PTFE/silicone bonded barrier ✅ Chemical resistance and sample protection
Fits 12 × 32 mm autosampler vials ✅ Standard 9‑425 compatibility
Knurled polypropylene cap ✅ Secure handling and application
Typical Applications
HPLC and UHPLC analysis
LC‑MS and GC‑MS workflows
Waters® Alliance and Acquity systems
Methods requiring easier needle alignment
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
X‑slit design offers easier penetration but reduced resealing vs single slit
Bonded septa—no assembly required
Intended for specialized applications
This and other custom items are Custom Ordered and require quotation
Additional Resources
Custom Item Pricing Information