国产剧情AV麻豆香蕉精品,国产女人A级毛片18视频,人妻丰满熟人熟妇av无码,久久99国产精品9床震网站

          Language:CHINESESENGLISH

          Homepage > Product > Self-tapping screws
          Contact Us
          • Address:Pingtang Industrial District, Shipeng Village, Shishan Town, Nanhai District, Foshan City,
          • Phone:0757-81002668/0757-63323396
          • Fax:0757-81196682
          • Contact:梁先生/Mr Leung
          • Phone:18900873383/18900873268
          • E-mail:sbs@sbsprefabhouse.com
          • Skype: sbs-Candy
          • URL:http://www.creadir.com

          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:7504 Time:[2018-5-4]

          Copyright:佛山市勝邦鋼結構有限公司 Foshan Shengbang Steel Structure Co., Ltd. Record Number:粵ICP備13078463號