Caps, Screw Top, with Silicone Rubber / PTFE Partial Pre-Slit (Y Shape) Septa, fitted in "knurled" polypropylene, Translucent Caps. For use with 9-425 thread, 12x32mm autosampler vials. Excellent for GC and GCMS. MICROSOLV Brand. 100/PK.
Additional Info:
Partial pre‑slit septa are designed to allow easier needle entry while maintaining a continuous PTFE surface to help reduce solvent evaporation.
The 9502S‑34C‑T screw caps feature a Y‑shaped partial slit in the silicone layer only, leaving the PTFE intact to act as an evaporation barrier. This design provides improved resealing compared to fully pre‑slit septa, making it well suited for volatile samples and applications requiring repeated injections.
The silicone/PTFE septa offer chemical resistance and sample protection across GC and GC‑MS workflows. The translucent polypropylene cap with a knurled exterior ensures secure grip and consistent sealing performance on standard 9‑425, 12 × 32 mm autosampler vials.
Key Features & Benefits
Y‑shape partial slit ✅ Improved resealing after injection
PTFE barrier layer ✅ Reduces evaporation for volatile samples
Silicone/PTFE septa ✅ Chemical resistance and sample protection
Fits 12 × 32 mm autosampler vials ✅ Standard 9‑425 compatibility
Knurled polypropylene cap ✅ Secure handling and sealing
Typical Applications
GC and GC‑MS analysis
Volatile sample testing
Environmental and petrochemical analysis
Routine analytical laboratories
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
Partial slit design balances penetration and resealing
PTFE layer remains intact for evaporation control
Suitable for multiple injections
Additional Resources