CUSTOM ITEM: Caps, Screw Top, with Silicone Rubber / PTFE Partial Pre-Slit (Y Shape) Septa, fitted in "knurled" polypropylene, Blue Caps. For use with 9-425 thread, 12x32mm autosampler vials. Excellent for GC and GCMS. MICROSOLV Brand. 1000/CS. BULK PRICING.
Additional Info:
Provide enhanced vapor control and injection performance for volatile samples with screw top caps designed for demanding GC and GC‑MS workflows.
9502S-34C-B-M caps feature a partial pre‑slit septa design in which only the silicone rubber layer is slit, leaving the PTFE layer intact to maintain an effective vapor barrier. This design allows easier needle penetration while minimizing sample evaporation, making it ideal for autosampler applications involving volatile compounds.
The Y‑shape slit improves resealing performance after injection compared to full pre‑slit designs, helping maintain sample integrity during repeated injections. The silicone rubber is 45 Shore hardness and 1.0 mm (0.040 inch) thick, providing a balance of flexibility and durability. The PTFE layer ensures chemical inertness, while the knurled polypropylene cap design offers secure handling in high‑throughput environments.
Key Benefits
Partial pre‑slit design maintains PTFE vapor barrier
Ideal for volatile samples requiring controlled sealing
Y‑shape slit improves resealing after injection
45 Shore, 1.0 mm silicone for durability and flexibility
PTFE layer provides chemical resistance and inertness
Case quantity (1000/CS) supports high‑volume workflows
Typical Applications
GC and GC‑MS analysis
Volatile compound testing
LC‑MS workflows requiring vapor control
Environmental and pharmaceutical laboratories
High‑throughput analytical operations
Specifications
Cap Type: Screw Top
Thread Size: 9‑425 (ND9)
Cap Material: Polypropylene (knurled, blue)
Septa: Silicone rubber / PTFE
Septa Type: Partial pre‑slit (Y‑shape)
Silicone Hardness: 45 Shore
Silicone Thickness: 1.0 mm (0.040 in)
Compatibility: 12 × 32 mm autosampler vials
Pack Size: 1000 caps (Case)
Compatibility
Designed for 9‑425 (ND9) screw thread autosampler vials
Compatible with standard 12 × 32 mm vial formats
Suitable for GC, GC‑MS, HPLC, and LC‑MS workflows
Performance and Design Notes
Partial slit design balances penetration ease with vapor containment
Y‑slit enhances resealing compared to full slit septa
PTFE layer maintains inert barrier for sensitive analytes
Designed for consistent performance in volatile sample workflows
Important Notes
Custom order item – inquire for availability
Case quantities available for high‑volume use
Recommended for applications requiring both vapor control and pre‑slit functionality
Custom Item Pricing Information