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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" |
| 一、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. |
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| 4、According to the pitch shape(cut
on head), there are as follows, Customized Shape are available
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| 5、According to screw thread, common
thread types are as follows. Customerized are available
too |
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| 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 FINISHINGS：1、ZINC 2、NICKEL
3、BRASS 4、BLACE OXIDE 5、CHROMATE 6、BLACK ZINC |
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