CUSTOM ITEM: Caps, Screw Top, Solid PTFE with thinned penetration area. "Knurled" Translucent Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MICROSOLV Brand. BULK PRICING.
Additional Info:
Solid PTFE caps are selected when maximum chemical inertness and minimal extractables are required, particularly in methods where polymeric or elastomeric materials may interfere with results.
The 9502S‑50‑N screw caps are manufactured entirely from PTFE with a precision thinned penetration area to allow autosampler needle entry without additional septa. This design eliminates potential contamination from polypropylene or silicone, making it suitable for highly sensitive LC‑MS and analytical workflows.
Due to the non‑elastic nature of PTFE, these caps are best suited for single injections or non‑volatile applications where resealing is not required. The knurled exterior provides improved grip and handling while maintaining compatibility with standard 9‑425 thread, 12 × 32 mm autosampler vials.
Key Features & Benefits
Solid PTFE construction ✅ Ultra‑low extractables and chemically inert
No silicone or polypropylene ✅ Eliminates material interference
Thinned penetration area ✅ Enables direct needle entry
No resealing capability ✅ Ideal for single injection methods
Knurled cap design ✅ Improved handling and torque control
Typical Applications
LC‑MS and high-sensitivity analysis
Methods requiring zero rubber or polymer interference
Pharmaceutical and trace analysis
Non‑volatile sample testing
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
PTFE caps do not reseal after puncture
Recommended for single injection applications
Best suited for non‑volatile samples
This and other custom items are Custom Ordered and require quotation
Custom Item Pricing Information