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      Homepage > Product > Self-tapping screws
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      Self-tapping screws

      Self-tapping screws



      Self-tapping screw is one of the threaded fasteners pre-drilled strike out in metal or nonmetal material. It has high tensile, single and unilateral combination characteristic. Self-tapping screw materials can be divided into carbon steel and stainless steel two kinds. Usually, it is made by 1022 medium carbon steel.

      Classification:
      1. According to different heads, it can be divided into: round head, flat head (that is, countersunk head), shore head, dome wide edge head, great circle head (that is, large flat head), hex socket head, hex socket hole washer head, hexagon head.
      2. According to the troughs, there are word slotted head type (also called slot), phillips head type, 11 words compound type and M words type.
      3. According to standard, it can be divided into: GB, German standard (DIN), American standard (ANSI), British standard (BS).

      Philips countersunk head tapping screw specification
      Standard: Cross slot GB845-85 GB846-85 GB847-85 JIS1122
      Materials: Carburizing steel stainless steel
      Surface: Galvanized
       

       

      GB846-85 Philips countersunk head tapping screw

      Carburizing steel stainless steel
      L<=50mm L>50mm
      Thread length according to the agreement

      Thread Specification

      ST2.2

      ST2.9

      ST3.5

      ST4.2

      ST4.8

      ST5.5

      ST6.3

      dk max

      3.8

      5.5

      7.3

      8.4

      9.3

      10.3

      11.3

      K  max

      1.1

      1.7

      2.35

      2.6

      2.8

      3

      3.15

      m

      H

      1.9

      3.2

      4.4

      4.6

      5.2

      6.6

      6.8

      Z

      2

      3.2

      4.3

      4.6

      5.1

      6.5

      6.8

      Slot number

      0

      1

      2

      2

      2

      3

      3

      L

      4.5-1.6

      6.5-19

      9.5-32

      13-38

      16-45

      19-50

      22-75

      Hits:7673 Time:[2018-5-4]

      Copyright:佛山市勝邦鋼結(jié)構(gòu)有限公司 Foshan Shengbang Steel Structure Co., Ltd. Record Number:粵ICP備13078463號
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