Tianjin drywall nail analysis of the use of various screws and nuts 1, ordinary hex - widely used, characterized by a relatively large fastening force, the disadvantage is that there must be enough operating space when installing, you can use a spanner or An open-end wrench or a wrench above the eyeglass wrench requires a lot of room for operation.
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Tianjin drywall nail analysis of the use of various screw nuts
1. Ordinary outer hexagon - it is widely used. It is characterized by relatively large fastening force. The disadvantage is that there must be enough working space when installing. You can use an adjustable wrench or an open wrench when installing, or the wrench above the glasses wrench needs to be very Large operating space.
2, the hexagonal hexagon socket - is the most widely used of all screws, because he has a large fastening force, can be operated with an Allen key, easy to install, almost used in a variety of structures, the appearance is more beautiful and tidy, The disadvantage is that the fastening force is lower than the outer hexagon, and the repeated use of the inner hexagon is easy to damage and cannot be disassembled.
3, Pan head hexagonal - rarely used mechanically, mechanical properties are the same as above, under special circumstances and conditions.
4, headless hex - some structures must be used, such as the top wire structure that requires a large top force, or where the cylinder head needs to be hidden.
5, countersunk head hex - there seems to be no such screw in the national standard.
6, woolen nut - no friction surface, to prevent the structure of the spark, mechanically seldom used.
7, flange nut - do not know, there is a blue nut that needs to be rust-proof.
8, ordinary hex nut - huh, huh is used for ordinary screws.
This article by Juxuanxiang Hardware: http:// finishing compilation!
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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