Product Description
Glued liners can loosen or contaminate samples after repeated autoclaving, and that risk disappears when the liner is welded in place. These screw caps bond their liner ultrasonically, making them a dependable choice for biological media, volatile solvents, corrosive chemicals and sensitive compounds.
This listing is for Wheaton catalog number 240250-01: MICROLINK Screw Cap, White, PP / Silicone / PTFE, 20-400, Solid Top, Case of 48. Caps are polypropylene in black or white, in solid top or open top styles for syringe access. Liners use low-compression-set silicone for long-term storage across wide temperature ranges, faced with PTFE or polypropylene for an inert, chemical-resistant surface. Threads include 20-400, 24-400, 28-400, 33-400, 33-430 and 38-430, and caps are autoclavable in Lab Packs or Case Packs. LIGHT LABS supplies the complete DWK Life Sciences line, including Kimble, Wheaton and DURAN labware.
Key Features
- Welded liner – Ultrasonic bond avoids glue contamination and liner failure.
- Low-compression-set silicone – Maintains the seal during long storage.
- Inert facing – PTFE or polypropylene face resists chemicals.
- Open top option – Syringe access without removing the cap.
- Autoclavable – Withstands repeated steam sterilization.
Specifications
| Catalog Number | 240250-01 |
| Brand | Wheaton (DWK Life Sciences) |
| Description | MICROLINK Screw Cap, White, PP / Silicone / PTFE, 20-400, Solid Top |
| Sold As | Case of 48 |
| Cap material | Polypropylene |
| Liner | Silicone with PTFE or polypropylene face, ultrasonically welded |
| Style | Solid top; open top |
| Thread | 20-400; 24-400; 28-400; 33-400; 33-430; 38-430 |
| Color | Black; white |
| Autoclavable | Yes |
Available Options
- 240106 – MICROLINK Screw Cap, Black, PP / Silicone, 33-430, Solid Top, Case of 50
- 240112 – MICROLINK Screw Cap, Black, PP / Silicone / PTFE, 33-430, Open Top, Case of 50
- 240114 – MICROLINK Screw Cap, Black, PP / Silicone / PTFE, 38-430, Open Top, Case of 50
- 240250 – MICROLINK Screw Cap, White, PP / Silicone / PTFE, 20-400, Solid Top, Case of 600
- 240235-01 – MICROLINK Screw Cap, White, PP / Silicone / PP, 38-430, Solid Top, Case of 24
- 240251-01 – MICROLINK Screw Cap, White, PP / Silicone / PTFE, 24-400, Solid Top, Case of 48
- 240256-01 – MICROLINK Screw Cap, White, PP / Silicone / PTFE, 38-430, Solid Top, Case of 24
Applications
- Biological media bottles
- Volatile solvent storage
- Corrosive chemicals
- Long-term sample storage
