Wide-Mouth Specimen Container Screw Caps — 120 mm, Polypropylene Copolymer, White, 50/Bag (300-9120-W3K)
These wide-mouth screw caps are designed to fit specimen containers with a 120 mm diameter opening, providing a secure threaded closure for sample containment and transport. Molded from polypropylene copolymer (PPC) in white and supplied non-sterile in 50/Bag packaging, part number 300-9120-W3K is well suited to high-volume laboratory and specimen-collection workflows where reliable, leak-resistant closure is essential.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-9120-W3K |
| Style | Wide-Mouth Screw Cap |
| Diameter | 120 mm |
| Material | Polypropylene Copolymer (PPC) |
| Color | White |
| Sterility | Non-Sterile |
| Pack Size | 50/Bag |
| Country of Origin | USA |
Applications
- Closing and resealing wide-mouth specimen collection containers during sample handling
- Securing bulk biological or environmental specimens during transport and storage
- Replacement or spare closures for compatible wide-mouth laboratory containers
- Color-coded cap management in multi-container specimen workflows
- General laboratory use requiring a threaded, wide-bore closure
Material & Chemical Resistance
Polypropylene copolymer (PPC) offers excellent resistance to aqueous solutions, dilute acids and bases, and common biological buffers, making it a reliable choice for specimen containment. PPC is autoclavable, supporting heat-sterilization of caps when process requirements demand it. As with all polypropylene-based materials, prolonged contact with chlorinated solvents, aromatic hydrocarbons, and concentrated oxidizing acids should be avoided.
Quality & Procurement
Made in USA, Caplugs® Evergreen specimen container caps are manufactured under ISO 9001 quality management from BPA-free, phthalate-free, latex-free resin. LabSupplies.com is an authorized dealer and ships from USA inventory, typically same business day for stocking items, with tiered pricing available for institutional and high-volume procurement accounts.
Frequently Asked Questions
Are these screw caps sterile?
No — they are supplied non-sterile in 50/Bag bulk packaging. If sterility is required, the polypropylene copolymer construction makes them suitable for autoclave sterilization prior to use.
What container opening size do these caps fit?
These caps are designed for wide-mouth containers with a 120 mm diameter opening. Confirm the thread profile of your specific containers is compatible before ordering.
Can these caps be used with solvents or aggressive chemicals?
Polypropylene copolymer performs well with aqueous samples, dilute acids and bases, and alcohols. It is not recommended for use with chlorinated solvents, aromatic hydrocarbons, or concentrated oxidizing agents.