As a professional China screw manufacturer, you must be familiar with the classification and quality standards of self-tapping laptop screw. However, many friends still do not have many knowledge about it. Today, follow King-Tower Catherine to learn the classification and quality standards of self-tapping laptop screw.
1. Slot self-tapping screws
A. Slotted pan head tapping screw: ISO1481，GB/T5282，ASME B18.6.4. DIN standard do not have slot pan head self-drilling screw. It is instead by slotted cylinder head self-drilling screw: DIN7971.
B.Slotted countersunk head tapping screws: ISO1782，GB/T5283，DIN7972，ASME B18.6.4.
C. Slot oval head self-drilling screw: ISO1483，GB/T5284，DIN/T7973，ASME B18.6.4.
2. Philips self-tapping screws
A. Cross trough pan head self-drilling screw: ISO7049，GB/T845，DIN7981，ASME B18.6.4.
B. Philips countersunk head tapping screws: ISO7050，GB/T846，DIN7982，ASME B18.6.4.
C. Philips oval head self-drilling screw: ISO7051，GB/T847，DIN7983，ASME B18.6.4.
3.Hexagon head tapping screws, hexagon flange head tapping screws, hexagon washer head tapping screws.
A. Hexagon head tapping laptop screw: ISO1479，GB/T8285，DIN7976，ASME B18.6.4.
B. Hexagon flange head tapping screws: ISO10509，GB/T16824.2. There is no DIN、ASME at present.
C. Hexagon washer head tapping screws: ISO7053，GB/T16824.1，ASME B18.6.4. There is no DIN at present.
Above is the classification and quality standards of self-tapping laptop screw. I hope this article can be helpful to you.