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GB/T 6559-1986 PDF English


Search result: GB/T 6559-1986 English: PDF (GB/T6559-1986)
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GB/T 6559-1986English80 Add to Cart 0-9 seconds. Auto-delivery. Screw thread shanks for thread forming screw. Metric coarse thread series  
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GB/T 6559-1986: PDF in English (GBT 6559-1986)

GB 6559-86 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA UDC 621.882 Screw Thread Shanks for Thread Forming Screw – Metric Coarse Thread Series ISSUED ON. JULY 2, 1986 IMPLEMENTED ON. MAY 1, 1987 Issued by. National Bureau of Standard Table of Contents 1 Introduction... 3  2 Normative References ... 3  3 Dimensions... 3  4 Dimensional Inspection ... 6  5 Marking ... 7  Additional Instructions... 7  Screw Thread Shanks for Thread Forming Screw – Metric Coarse Thread Series 1 Introduction This Standard applies to the thread forming screws of metric coarse thread series and thread specification M2 to M12. The screw thread shanks for thread forming screw have threads of arc-shaped triangular cross section, as shown in Figure 1. The screw is hardened on the surface; it can be screwed in the pre-drilled holes (made by drilling, punching or pressure casting) of ferrous or nonferrous metals; and it forms internal thread by tapping. The thread forming screw shall be possessed of low screwing-in torque and high locking performance. Figure 1 2 Normative References GB 196-81 General Purpose Screw Threads - Basic Dimensions GB 197-81 General Purpose Screw Threads – Tolerances and Fits 3 Dimensions 3.1 The types and dimensions of thread shall be as specified in Figure 2 and Table 1. ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.