Agilent Screw Cap with PTFE Septa 2 Packs with 100 Caps Each - Total of 200 Caps

Agilent 5183-2076 Bonded Screw Cap – 9 mm, Blue, PTFE/Silicone Septa

The Agilent 5183-2076 is a premium 9 mm screw-thread closure designed for 2 mL autosampler vials used in HPLC, GC, and LC/MS applications. This cap features an advanced bonded septa design, where the PTFE/silicone liner is chemically fused to the blue polypropylene housing. This specialized construction prevents septa displacement—commonly known as "push-through"—even when using blunt or high-gauge autosampler needles. The high-purity silicone provides an excellent resealable barrier for multiple injections, while the PTFE layer ensures a chemically inert interface that protects your samples from contamination or evaporation. Precision-engineered for a perfect fit, these caps provide the airtight seal necessary for maintaining sample integrity during high-throughput analytical sequences.

Technical Performance and Design

• Bonded Septa Technology: The septa is permanently bonded to the cap, eliminating the risk of the liner falling into the vial or interfering with the needle during injection, which significantly reduces instrument downtime.

• 9 mm (9-425) Thread: Features the industry-standard 9-425 screw thread, ensuring universal compatibility with most 12 x 32 mm (2 mL) vials from Agilent, Waters, Thermo, and Shimadzu.

• PTFE/Silicone Liner: Combines the chemical resistance of PTFE (facing the sample) with the elastic resealing capabilities of silicone, preventing solvent evaporation and allowing for reliable multiple-injection runs.

• Easy-Grip Ribbed Sides: The blue polypropylene cap is designed with a ribbed exterior to provide a secure grip for both manual tightening and robotic vial-gripping arms.

Product Specifications

• Catalog Number: 5183-2076

• Cap Type: 9 mm Screw Cap (9-425)

• Cap Material: Blue Polypropylene

• Septa Material: Bonded PTFE / White Silicone

• Compatibility: Standard 2 mL (12 x 32 mm) Screw Top Vials

• Quantity: Typically sold in packs of 100

Key Benefits & Applications

• High-Throughput HPLC/GC: The bonded design is essential for overnight runs or large sample batches where a single pushed-through septa could ruin a sequence or damage an expensive needle.

• Volatile Solvent Handling: Provides a superior airtight seal for samples containing volatile organic compounds (VOCs) or sensitive mobile phases, preventing concentration shifts due to evaporation.

• Trace Analysis: Manufactured under cleanroom conditions with high-purity materials to ensure low extractables, making these caps suitable for sensitive LC/MS and GC/MS work.

• Universal Lab Standard: Because 9 mm is the most common thread size for modern autosamplers, these caps are a versatile, drop-in solution for laboratories using multiple instrument brands.

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