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Ksh Plastic screw introduction of standards and norms
Author£ºadmin  Source£º±¾Õ¾  Posted£º2009-10-12 11:00:52 PM  Click£º4529

      In plastic screw fasteners of the market, Forbes China has also been a marked in accordance with international regulations for the production and R & D, the standard is the norm, each country and sector has its own standards. At present, Forbes Chinese enterprises in the plastic fastener plastic

Screws where the most commonly used standards are the following:

      Forbes China in the production of the plastic screw products, but also plastic screws in accordance with the product market regulation at all levels of the strict classification of the plastic screw fastener series of applications, the main categories are mainly the following criteria:

  The concept of metric plastic screws: GB-Chinese national standard and this is our common standard metric plastic screws, (collectively referred to as GB)
  The concept of US-made plastic screws: ANSI-American National Standards Institute (ANSI)
  The concept of German-made plastic screws: DIN-German national standard (DIN) ASME-American Society of Mechanical Engineers standards
  Standard plastic screws on the concept: JIS-Japanese National Standards (JIS) BSW-British Standard
     GB - (metric plastic screws) - the national standard is one of China's many standards, in addition to industry standards, professional standards and departmental standards. National standard is divided into: GB (mandatory standards) and GB / T (recommended standards), and

GBn (country's internal standard) and so on. Forbes Chinese Web sites for e-www.keshihua.com often seen as the GB30, GB5783, etc. are all mandatory standards.

   Forbes Chinese electronic upload a wide range of plastic screws, plastic fasteners in accordance with the current classification of the main products are: plastic screw plastic screws nuts Hexagon separation column Holder Plastic rivets nylon washers screw cap button, etc. and stationery.

    Forbes China in accordance with the production of plastic screws standard classification of the concept, Forbes China in addition to various types of screws in the international classification, but also many products of each screw several standard apart from some basic dimensions such as head-to-edge, the first outside the Ministry of different thickness, etc.

The most important is the thread part of the difference.

    GB, DIN, JIS, etc. threads are based on MM (mm) as a unit, collectively known as the metric thread. The other, like ANSI, ASME, etc. thread is in. as the unit known as the American standard thread. In addition to metric screw thread outside the U.S. system, there is a BSW-English

System standard, and its threads are in inches as a unit, commonly known as the Forbes China thread.

   Metric plastic screw thread is MM (mm) as a unit, its teeth cusp of 60 degrees. American and British screw thread are all in units of inches. US-made thread tooth cusp is 60 degrees, while the British thread tooth cusp of 55 degrees. Because of measurement

The different units, resulting in a variety of threads that a different approach. For example, as the M16-2X60 that is the metric thread. He specifically means that the nominal screw diameter of 16MM, teeth distance of 2MM, the length of 60MM, and if:

1/4-20X3/4 thread that is British, he specifically means the nominal diameter of the screw 1 / 4 inch (one inch = 25.4MM), in one inch, 20 teeth, the length of 3 / 4 inches. Also would like to express words of US-made screws will usually

Said the British screws followed by UNC and UNF, in order to differentiate the American system of US-made coarse or fine tooth tooth.

In peacetime domestic business, we are the most commonly encountered standard is GB (GB) and DIN (German standard).


In the Forbes China plastic screw hygiene products, the main access to the following standards: GB30; GB5783; GB5782; GB52; GB6170; GB818; GB819; GB845; GB846; GB70; DIN912; DIN933; DIN931 and so on. Head

Pre-GB30 (Old GB) in the standard book has been GB5783 (new GB) replaced. GB52 (Old GB) in the standard book has been GB6170 (new GB) replaced.

In 1986, the standard parts of our country to develop a new standard in the business commonly known as the new standard, using the most main GB5780, GB5781, GB5782, GB5783, GB5784. GB5780 coarse hexagonal head screw rod and a half teeth, its fine

Degree of rating for a C-class products that can be used GB5782 to replace (GB5782 hexagonal head screws coarse rod-wide teeth, and its accuracy until the grade for the A-and B-.) GB5781 hexagonal head screws the whole tooth, accuracy rating for a C-class products. GB5783 used instead of (GB5783

For the hexagonal head screws the whole tooth, and its accuracy rating for A grade and B grade). GB5784 for the thin rod and a half teeth hexagonal screws.

The new standard with the old underlying difference is that: M8, M10, M12, M14, M22 series of products, in the right side of the width differ. In addition to M22 series of new products, the new standard products M8, M10, M12, M14 in the head right side of the subject-to-edge than the old smaller 1MM

. Respectively, 13,16,18,21 MM, while the M22 series of new products, new subject-to-edge than the old standard and have to be big 2MM, should pay particular attention. For the head thickness, the new standard, and a slight difference between the old standard, the requirements are not very strict circumstances can pass

Use.

The new standard and the difference is that the subject of Germany: M10, M12, M14, M22 product specifications, in the right side of the width of different. M10, M12, M14 in the head right side of the new standard is smaller than the German standard 1MM. The M22's new products, and its head on the right side of the subject than in Germany

Edge width of the larger 2MM, others may be universal.

For the hexagonal nut, common standards: GB52, GB6170, GB6172, and DIN934, for the main differences between them are: GB6170 thickness than the GB52, GB6172, and DIN934 come thick, commonly known as thick nuts. The other is right

The edge of the difference, M8 nut series DIN934, GB6170, GB6172 of the right side are the 13MM of the right side of 14MM than the GB52 smaller 1MM, M10 nut, DIN934 and GB52 of the right edge of 17MM, compared with GB6170 and GB6172 The right side of the larger 1MM,

M12 nut, DIN934, GB52 of the right side for the GB6170 and the GB6172 than 19MM on opposite sides of 18MM larger 1MM. For the M14 nut, DIN934, GB52 of the right side for the GB6170 and the GB6172 than 22MM on opposite sides of 21MM larger 1MM. The other is the M22's

Nut, DIN934, GB52 of the right edge of 32MM, compared with GB6170, GB6172 of the right side of 34MM smaller 2MM. (GB6170 and GB6172 in addition to its not the same as the thickness, the right side of the width of exactly the same as) the remaining specifications without taking into account the thickness of the circumstances, it can pass

Use.

Including the hexagonal, the GB has two versions, one for GB70-76, 76-year version, a version for GB70-8585 years, my company is implementing DIN912 standard, so the actual business operations should pay attention to differences: One GB70 -85

Completely coincides with the DIN912, so the subject of the use of the new situation, there is no differences, mainly GB70-76 and DIN912 differentiated between: M8 series Hexagon products, GB70-76 in round diameter 12.5MM, than DIN912 The smaller 13.27MM

Some, M10 series Hexagon products, GB70-76 in round diameter of 15MM, the 16.27 is smaller than the DIN912 some, M12 series within the hexagon, GB70-76 in round diameter 18MM, than the right side of 18.27 to DIN912 smaller, and the other like the M16, M20 Series

Hexagon GB70-76 in round diameter smaller than the DIN912 the 0.33MM, respectively, 24MM, 30MM. DIN912's were 24.33MM and 30.33MM. Another old standard with the German standard Hexagon width between the inside right side due to different standards and different, GB70

-76 Inside right edge to smaller, in the business operations should also be noted.

In addition, usually of nylon rivets may be used there are some differences to make a statement on this also, in the national standard, there are two kinds of nylon rivets standard, GB12 (Small Cup Head Square Neck screws) and GB14 (most of Round Square neck screw), flat

When the market was also more commonly used standard German standard DIN603. Is to distinguish between these three: for a round head and neck, when compared at the same specifications: GB12. Normally used in plastic screws, often require large, thick neck, so DIN603 carriage screw

Standard wire fully meet the requirement.

Name:
1. Machine screws 2. Self-tapping screw 3. DRILLING screws 4. Wallboard nails 5. Fiberboard nail 6. Plastic screw 7. Hexagonal screws 8. Do not get out of screws 9. Combination of screws 10. Mini-screws 11. Furniture screws 12. Electric

Sub-screw head type:

1. Hexagon head () 2. Hex head flange surface () 3. Square head () 4.T shaped like T) 5. Oblate head) 6. Cylinder head () 7. Round () 8. Pan head () 9. countersunk head () 10. semi-submerged head

Trough:
1. Nylon rivet groove screw 2. 10 / word 3. The word 4. Within the triangle 5. Mys Quartet 6. Cross 7. M word 8. Flower 9. Plum-shaped 10. Flower-shaped word 11. Special-shaped 12. Hexagon


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