Wide-Mouth Specimen Container Screw Caps — 120 mm, Polypropylene Copolymer, Green, 50/Bag (300-9120-G3K)
These wide-mouth screw caps are designed to fit specimen containers with a 120 mm diameter opening, providing a secure threaded closure for large-volume specimen collection and storage vessels. Molded from polypropylene copolymer (PPC) and color-coded green for easy identification, they are supplied non-sterile in convenient 50/Bag quantities suited to high-throughput laboratory and environmental sampling workflows. Part number 300-9120-G3K is an ideal replacement or bulk-supply cap for labs that process wide-mouth containers routinely.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-9120-G3K |
| Type | Wide-Mouth Specimen Container Screw Cap |
| Diameter | 120 mm |
| Material | Polypropylene Copolymer (PPC) |
| Color | Green |
| Sterility | Non-Sterile |
| Pack Size | 50/Bag |
| Country of Origin | USA |
Applications
- Recapping or replacing caps on wide-mouth specimen collection containers
- Color-coded closure management across multiple container types or sample groups
- Environmental and field sampling where large-volume, wide-mouth vessels are used
- Bulk specimen storage in clinical, research, or industrial laboratory settings
- Secondary containment and transport of large-volume liquid or solid specimens
Material & Chemical Resistance
Polypropylene copolymer (PPC) offers excellent resistance to aqueous buffers, dilute acids and bases, and many common alcohols, making it well suited to a broad range of laboratory specimens and cleaning reagents. PPC can be autoclaved, supporting reuse in sterile workflows when sterilization is required. As with all polypropylene-based materials, prolonged contact with chlorinated solvents, aromatic hydrocarbons, or concentrated oxidizing acids should be avoided.
Quality & Procurement
Made in USA, Caplugs® Evergreen specimen container caps are produced under ISO 9001 quality management from BPA-free, phthalate-free, latex-free resin. LabSupplies.com is an authorized dealer of Caplugs® Evergreen consumables and ships from USA inventory, with tiered pricing available for high-volume institutional and procurement accounts.
Frequently Asked Questions
Are these screw caps sterile?
No — the 300-9120-G3K caps are supplied non-sterile. If sterile closures are required for your application, downstream sterilization by autoclave is feasible given the autoclavable nature of polypropylene copolymer.
What container thread size or style do these caps fit?
The caps are specified at 120 mm diameter for wide-mouth specimen containers. We recommend verifying that your containers carry a matching 120 mm threaded opening before ordering, as thread pitch and finish can vary by container manufacturer.
Why are the caps green — does the color indicate anything specific?
The green color is a molded-in pigment used for visual identification and color-coded workflow organization. It does not indicate a specific chemical treatment, sterility status, or regulatory classification; labs may assign the color code meaning according to their own internal protocols.