1、Cap and Neck FinishesScrew thread cap sizes are generally expressed as two numbers. The first number refers to the cap diameter (in millimeters) and the corresponding Glass Packaging Institute (GPI)/Society of the Plastics Industry (SPI) finish diameter.The second number refers to the height and thr

2、ead configuration of the closure or finish. Below is a selection of commonly used caps and finishes.S=Thread StartH=Finish HeightT=Major DiameterE=Minor DiameterI= Hole DiameterT - Outside diameter of the continuous threadE - Outside diameter of the finish shaft excluding threadI - The inside diamet

3、er of the finish at the smallest possible pointS - The distance between the top of the finish to the top of the threadL - The distance between the top of the finish to the top of the transfer bead(optional)H - Height from the top of the finish to the bottom where it intersects with the shoulderW- Th

4、e thickness of the transfer bead (optional)Standard Plastic Finishes Most Commonly Used.The diameter of ClosuresStandard Neck Finishes(1 turn of thread)(1圈螺牙)(turn of thread)(圈螺牙)(高位2圈螺牙)(Tall 2 turns thread)(Short 2 turns thread)(低位2圈螺牙)Plastic Thread Forms.Plastic thread form finishes typically ha

5、ve a standard "M" stylethread form, shown here. An "L" style can also be used but isnot as common. The root dimension will vary depending on thethreads per inch of the finish. Special thread forms can alsobe designed.Recommended Application Torque(Inch / Pounds)Cap Size蓋子尺寸Glass玻

6、璃Plastic 塑料瓶208-1210-122410-1512-152811-1713-173313-2016-203815-2319-234317-2621-264518-2823-284819-2924-295321-3227-325823-3529-356325-3831-387028-4235-428926-5344-5310040-6048-6011045-6555-6512048-7260-72瓶口螺紋詳細圖紙THDSMMTMINMAXEMIN400HMAX MIN410HMAX MIN415HSIMINPERINCHMAXMINMAXMAXMIN13.514.502.454.4

7、42.467.437.052.022.2181215.581.569.521.509.572.542.052.022.2581218.704.688.620.604.386.356.538.508.632.602.052.022.325820.783.767.699.683.386.356.569.539.757.727.052.022.404822.862.846.778.762.386.356.600.570.852.822.052.022.483824.940.924.856.840.415.385.661.631.972.942.061.031.516828.994.974.415.3

8、85.723.693.061.031.614630.418.388.061.031.653633.418.388.061.031.791635.418.388.061.031.875638.418.388.061.031.987640.418.388.061.031643.418.388.061.031645.418.388.061.031648.418.388.061.031651.423.393.061.031653.423.393.061.031658.423.393.061.031660.423.393.061.031663.423.393.061.031666.423.393.061.031670.423.393.061.031675.423.393.061