Catalog Number - 9503S-35C-K-M

BASIK™ Screw Caps with Pre-Slit Silicone/PTFE Septa are designed for reliable autosampler performance in HPLC, UHPLC, GC, and LC-MS laboratories. These black polypropylene caps feature a bonded silicone rubber/PTFE septa assembly that provides excellent chemical resistance, dependable sealing, and consistent autosampler needle penetration. The pre-slit septa design helps reduce coring and minimizes resistance during repeated injections, making these caps ideal for high-throughput analytical workflows.

9503S-35C-K-M is manufactured for use with standard 10-425 threaded 12 x 32 mm autosampler vials. The wide-mouth cap configuration promotes accurate autosampler needle alignment while the bonded septa design helps prevent liner dislodgement during handling, storage, and repeated sample injections. The black knurled cap provides a secure grip for easy installation and removal.

The 40 mil (1.016 mm) silicone/PTFE septa is slightly thinner than many conventional autosampler septa, allowing easier needle penetration while maintaining reliable resealing characteristics. Packaged in a convenient case quantity of 1,000 caps, this format is ideal for high-volume pharmaceutical, environmental, food, chemical, clinical, and research laboratories that require dependable performance and economical bulk purchasing.

Key Benefits

• Pre-slit silicone/PTFE septa

• Bonded septa design

• Wide-mouth cap configuration

• Black polypropylene construction

• Knurled cap for improved grip

• Reduced needle penetration force

• Helps minimize septa coring

• Reliable sample sealing

• Compatible with autosampler systems

• Economical bulk packaging

Typical Applications

• HPLC analysis

• UHPLC analysis

• LC-MS applications

• GC applications

• Pharmaceutical testing

• Environmental analysis

• Food testing

• Chemical analysis

• Quality control laboratories

• High-throughput research laboratories

Specifications

• Product Type: Screw Cap

• Closure Style: Screw Top

• Thread Size: 10-425

• Cap Material: Polypropylene

• Cap Color: Black

• Cap Style: Wide Mouth, Knurled

• Septa Material: Silicone Rubber / PTFE

• Septa Design: Pre-Slit, Bonded

• Septa Thickness: 40 mil (1.016 mm)

• Compatible Vials: 12 x 32 mm, 10-425 Thread

• Package Size: 1000/CS

• Brand: BASIK™

Important Notes

• Pre-slit septa allows easier autosampler needle penetration

• Bonded septa design helps prevent liner movement during use

• Wide-mouth configuration supports automated sample handling

• 40 mil septa thickness is slightly thinner than many standard septa designs

• Suitable for repeated autosampler injections

• Compatible with standard 10-425 threaded autosampler vials

• Designed for HPLC, UHPLC, GC, and LC-MS applications

• Black polypropylene cap provides durability and chemical resistance

• Bulk case quantity helps reduce per-unit packaging costs

• Smaller package quantities are available

Special Order Item Information

• Please review the Special Order Item Information for complete details.

• For pricing confirmation, availability, lead times, or application assistance, please contact MICROSOLV Customer Service.

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