Catalog Number - 97040-10C

Provide high‑purity sealing and consistent performance for EPA testing and storage workflows with screw top caps designed for reliability and compatibility. Manufactured with a knurled polypropylene exterior, these caps offer improved grip and ease of handling in both manual and high‑throughput laboratory environments. The silicone rubber / PTFE septa combination ensures durability, flexibility, and chemical resistance for demanding applications.

97040-10C caps feature EPA quality septa with a 45 Shore A hardness and a thickness of 3.2 mm, providing enhanced durability for repeated needle penetrations or long‑term storage. The 12.5 mm center hole allows precise and consistent needle targeting, supporting autosampler use while maintaining effective sealing. The PTFE layer provides excellent inertness to minimize analyte interaction, while the silicone backing enables resealability and consistent compression sealing.

These caps are compatible with 30 mL, 40 mL, and 60 mL EPA style vials using ND24 (24‑400) threads, offering flexibility across multiple vial sizes and workflows. They are ideal for laboratories requiring dependable caps for both environmental testing and extended storage applications.

Key Benefits

• EPA quality septa suitable for testing and storage

• 3.2 mm thick septa enhances durability and lifespan

• 45 Shore A hardness provides optimal flexibility and resilience

• PTFE/silicone septa ensures chemical resistance and inertness

• 12.5 mm opening enables consistent autosampler needle access

• Knurled cap design improves handling and grip

• Compatible with multiple EPA vial sizes (30, 40, 60 mL)

Typical Applications

• EPA and environmental testing

• LC‑MS and HPLC sample preparation

• Autosampler injection workflows

• Sample storage and transport

• Routine laboratory analysis

Specifications

• Cap Type: Screw Top

• Thread Size: ND24 (24‑400)

• Cap Material: Polypropylene (knurled, white)

• Septa: White silicone rubber / beige PTFE

• Septa Thickness: 3.2 mm

• Hardness: 45 Shore A

• Opening Size: 12.5 mm center hole

• Pack Size: 100 caps

Compatibility

• Designed for ND24 (24‑400) EPA style vials

• Compatible with 30 mL, 40 mL, and 60 mL EPA vials

• Suitable for autosampler and storage applications

Performance and Design Notes

• PTFE layer minimizes analyte interaction

• Silicone backing allows resealing after injection

• Thick septa supports repeated injections and long‑term use

• Designed for consistent sealing and injection performance

Important Notes

• Suitable for EPA testing and long‑term storage

• Designed for vials with center access (12.5 mm opening)

• Ideal for laboratories requiring high‑purity, durable septa caps

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