Caps, Screw Top, Solid, Single injection use with a thinned penetration point. No Septa required. LCMS compatible, "knurled" polyethylene, Natural color Caps. For use with with 9-425mm thread, 12x32mm autosampler vials. AQ Brand. 100/PK.
Additional Info:
The 9502S‑09‑PE AQ™ Screw Caps are selected for LC‑MS workflows where septa resealing is not required after injection. These solid screw caps feature a thinned penetration point that allows direct autosampler needle entry without the use of separate septa components.
A proprietary venting design helps equalize pressure during injection while the internal sealing cone reduces solvent evaporation and helps maintain sample integrity. Manufactured from LC‑MS compatible ultra‑pure polyethylene, these caps are designed for low background interference and performance comparable to Pico Pure™ style caps.
These natural color knurled polyethylene caps are designed for use with 9‑425 thread, 12 × 32 mm autosampler vials. The knurled exterior improves grip during cap application and removal. These caps are not recommended for fused insert vials because the internal sealing cone is not compatible with insert configurations.
Single Injection Design – No Septa Required
Solid polyethylene cap design
Thinned penetration point for needle entry
No separate septa required
✅ Ideal for single‑injection LC‑MS workflows
LC‑MS Compatible Ultra‑Pure Polyethylene
Manufactured from ultra‑pure polyethylene
Designed for low background interference
Natural color cap construction
Comparable to Pico Pure™ style caps
✅ Suitable for sensitive LC‑MS applications
Proprietary Venting & Sealing Design
Integrated venting feature
Internal sealing cone minimizes evaporation
Supports reliable injection performance
✅ Helps maintain sample integrity during analysis
Standard 9‑425 Cap Format
Fits 9‑425 screw thread vials
Compatible with:
12 × 32 mm autosampler vials
Industry standard autosampler format
✅ Broad autosampler compatibility
Knurled Polyethylene Caps – Easy Handling
Knurled cap exterior improves:
Grip
Application and removal
Polyethylene cap construction
✅ Convenient laboratory handling
Typical Applications
LC‑MS analysis
Single injection workflows
High sensitivity chromatography
Pharmaceutical analysis
Analytical testing laboratories
Important Usage Notes
Use with 9‑425 thread, 12 × 32 mm autosampler vials only
Not recommended for fused insert vials
Designed for single‑injection applications
No separate septa required
✅ Also available: Case Quantity AQ™ 9502S‑09‑PE Screw Caps for 9‑425 Autosampler Vials