Caps, Screw Top, with Silicone Rubber / PTFE Septa, fitted in smooth sided, Robo Style, soft polypropylene, Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. BASIK Brand. 100/PK.
Additional Info:
The 9502S‑05‑B screw caps are one of our most popular standard autosampler caps, widely used as a reliable, economical solution for routine chromatography workflows. Their smooth‑sided Robo‑Style design makes them particularly well suited for laboratories using automated cap handling, robotic systems, or capper/decapper devices where knurled surfaces are not required.
The caps are fitted with silicone rubber / PTFE septa, providing chemical inertness, consistent sealing, and dependable needle penetration for routine HPLC, GC, and LC‑MS applications. The PTFE layer protects samples from direct silicone contact, while the silicone rubber provides effective resealing after injection.
Constructed from soft polypropylene, the Robo‑Style caps offer easy handling and controlled torque application, reducing stress on automated equipment while maintaining a secure seal on standard 9‑425 autosampler vials.
These caps are commonly selected as a cost‑effective alternative to National / Thermo DP™ screw caps, offering comparable fit and functionality without premium pricing.