MAIN PRODUCTS:Self Tapping Screws, Chipboard Screws,Machine Screws, Hex Socket Head Cap
Screws, Hex Socket Headless Set Screws,Wood Screws, Drywall Screws, Roofing Screws.
STANDARDS:GB、ISO、DIN、ANS(IFI)、BSW、JIS and Per Drawings.
SIZE RANGE:Machine Screw M3-M8 Tapping Screw 2.9-6.3(mm), #4-#14
LENGTH RANGE:6-100(mm)-1/4/4"
匯、Classifications of screws
1、By usage they fall into machine screw and self screw. Machine screw is that its outer thread screws its inner thread. Self screw, with only outer thread, has higher hardness. Some of them inlaid in other objects have no outer thread.
2、There are, by standard, ANSI, ISO, JIS, DIN, BSW,
Non-standard screws on request of customers are available. In most cases, self screw will be provided.
3、According to the shape of the head Of screwS, they are as follows.customized shapEs are accepted as well.
4、According to the pitch shape(cut on head), there are as follows, Customized Shape are available
5、According to screw thread, common thread types are as follows. Customerized are available too
6、Dividing by the number of the threads, there are: A. self Tapping Screw with steel teeth, fast teeth (single or dual), stage teeth, or triangle teeth B. Standard teeth-space machine screws
7、By the raw material, screws fall into several groups, ie, screws of low (moderate) carbon steel, screws of alloy steel, screws of copper, screws of stainless steel.
SURFACE FINISHINGS1、ZINC 2、NICKEL 3、BRASS 4、BLACE OXIDE 5、CHROMATE 6、BLACK ZINC
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