Catalog Number - 97040-SP-24

Provide secure, high‑integrity sealing for EPA style vials with solid top screw caps engineered for long‑term storage and transport applications. Constructed from durable knurled polypropylene, these caps offer excellent grip and consistent handling while maintaining a tight seal in demanding laboratory environments. The solid top design eliminates any center opening, ensuring complete containment for sensitive or volatile samples.

97040-SP-24 caps feature a 2.5 mm thick butyl rubber / PTFE liner with a 55 Shore A hardness, delivering a firm and resilient compression seal. The butyl rubber component provides superior gas and vapor barrier performance, making it ideal for volatile compounds, while the PTFE layer offers chemical inertness to minimize interaction with stored samples. This liner combination is well suited for EPA testing and extended storage where both sealing strength and chemical compatibility are critical.

These caps are compatible with 30 mL, 40 mL, and 60 mL EPA style vials using ND24 (24‑400) threads. Their solid, non‑penetrable configuration makes them ideal for applications where injection is not required, ensuring reliable sealing during storage or transportation.

Key Benefits

• Solid top design provides secure, leak‑resistant sealing

• Butyl rubber liner offers superior gas and vapor barrier properties

• PTFE layer ensures chemical resistance and inertness

• 2.5 mm liner thickness enhances durability and sealing strength

• 55 Shore A hardness provides firm, reliable closure

• Knurled cap design improves grip and usability

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

Typical Applications

• EPA and environmental sample storage

• Sample transport and containment

• Storage of volatile or sensitive compounds

• Chemical and reagent storage

• Long‑term laboratory storage workflows

Specifications

• Cap Type: Screw Top (Solid)

• Thread Size: ND24 (24‑400)

• Cap Material: Polypropylene (knurled, white)

• Liner: Red butyl rubber / grey PTFE

• Liner Thickness: 2.5 mm

• Hardness: 55 Shore A

• Opening: None (solid top)

• 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 storage and transport applications

Performance and Design Notes

• Butyl rubber enhances sealing for volatile compounds

• PTFE layer minimizes analyte interaction

• Solid design prevents evaporation and contamination

• Designed for reliable long‑term containment

Important Notes

• Not intended for autosampler injection (no center hole)

• Designed specifically for storage and transportation

• Ideal for applications requiring strong vapor barrier protection

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