Tight-head containers with Rieke 70mm threaded caps are commonly used in laboratories due to their compliance with UN and DOT standards, ensuring safe storage and transport of hazardous materials. In some regions, regulations allow these containers to be shipped directly from the lab to incineration facilities, providing a convenient option for disposing of hazardous waste.

These 70mm caps are available in two thread options: 6 threads per inch (TPI) and 8 TPI. Determining the TPI of your container can be tricky, but many Rieke caps conveniently have the TPI number embossed along the rim. If your cap doesn’t display this marking, it’s a good idea to verify the TPI with your supplier or request a sample cap to ensure proper compatibility.