Wuxi Nest Sample Vials Screw Cap with Sealing Ring, Flat Cap, Red, Sterile Bag Package, 500 pcs/pack, 4 packs/case, 2000 pcs/case , 633981R

Sterile red flat screw caps with sealing ring for sample vials, supplied in bag packaging (500 pcs/pack, 4 packs/case, 2000 pcs/case). These caps provide a secure, leak-resistant closure for polypropylene sample vials used for collection, transportation and short-term storage of biological specimens and reagents. The silicone O-ring inside the screw cap ensures reliable sealing under negative pressure and during centrifugation, supporting downstream applications such as PCR extraction, culture and other laboratory workflows.

Key Features:

• Cap style: Flat screw cap with sealing (silicone) ring
• Color: Red
• Sterility: Sterile
• Packaging: Bag package, 500 pcs per pack, 4 packs per case (2000 pcs per case)
• Material compatibility: Designed for use with polypropylene sample vials (meets USP Class VI material requirements)
• Sealing performance: O-ring sealing; tested to negative pressure of -0.95 bar and liquid-tight standards
• Centrifugation tolerance: Withstands up to 20,000 xg

Advantages:

• Secure, leak-resistant closure provided by integrated silicone O-ring, reducing sample loss during transport and handling
• Sterile packaging minimizes contamination risk for molecular biology and culture workflows
• Color-coded red caps enable fast visual identification and sample organization
• High mechanical tolerance supports centrifugation up to 20,000 xg and negative-pressure transport compliance