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. BULK PRICING.
Additional Info:
Provide enhanced sealing for volatile samples with screw top caps designed to balance needle penetration and vapor retention in demanding GC and GC‑MS workflows.
9502S-34C-B caps feature a unique partial pre‑slit septa design where only the silicone rubber is slit, leaving the PTFE layer intact. This creates an effective vapor barrier while still allowing easier needle penetration, making these caps especially suitable for volatile compounds where evaporation control is critical.
The Y‑shape partial slit improves resealing of the silicone after injection compared to fully slit designs, helping maintain sample integrity during repeated injections. The 45 Shore, 1.0 mm thick silicone provides optimal flexibility and durability, while the PTFE layer ensures chemical resistance and inertness. The knurled polypropylene cap design enhances grip and usability in both manual and automated workflows.
Key Benefits
Partial pre‑slit design maintains PTFE vapor barrier
Ideal for volatile samples requiring controlled sealing
Y‑shape slit improves resealing after injection
1.0 mm, 45 Shore silicone provides durability and flexibility
PTFE layer ensures chemical resistance and inertness
Knurled cap design improves handling and consistency
Bulk pricing available for high‑volume use
Typical Applications
GC and GC‑MS analysis
Volatile compound testing
LC‑MS workflows requiring vapor control
Pharmaceutical and environmental laboratories
High‑precision analytical applications
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
Packaging: Bulk (Custom Item)
Compatibility
Designed for 9‑425 (ND9) screw thread autosampler vials
Compatible with standard 12 × 32 mm vial formats
Ideal for GC, GC‑MS, HPLC, and LC‑MS workflows
Performance and Design Notes
Partial slit balances penetration ease with vapor containment
Y‑slit improves resealing compared to full slit designs
PTFE layer maintains inert barrier for sensitive samples
Designed for reliable performance in volatile sample analysis
Important Notes
Custom item – inquire for availability and case quantities
Recommended when both pre‑slit access and vapor control are required
Ideal for GC applications with volatile analytes
Custom Item Pricing Information