NKSSC-22-S-1 24 mm Black PP Screw Cap With 15 mm Centre Hole And Natural PTFE/Silicone Septa (CAT#: STEM-AL-0021-ZJF)

This product is a 24 mm screw closure for storage vial sealing and sample access. It is configured with a black polypropylene cap and a 15 mm centre hole. The closure includes natural PTFE and natural silicone septa. The centre-hole design allows needle access through the septa during analytical handling. The 24-414 thread format supports use with compatible storage vials. The septa structure helps maintain containment while permitting puncture-based sampling. The product is intended for workflows requiring vial closure, sample protection, and controlled access. This model is applicable to TOC-related applications and purge and trap techniques.

Closure Type: Screw closure
Thread Format: 24-414
Cap Size: 24 mm
Cap Material: Polypropylene (PP)
Cap Color: Black
Top Design: Open top with 15 mm centre hole
Septa Material: Natural PTFE/natural silicone
Septa Thickness: 3.0 mm
Septa Hardness: 45 Shore A
Application Method: TOC (EPA)
Technique: Purge and trap

Open-top structure for septa access
Polypropylene cap construction
Natural PTFE/silicone septa configuration
Compatible with 24-414 storage vials
Supports needle penetration
Medium resealability after puncture
Helps reduce contamination risk
Suitable for analytical vial sealing