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1 Subject content
This standard specifies the wing nuts with the thread specification of M3×0.5 to M16×1.5.
Notes: The varieties of commodity fastening pieces shall be given priority.
2 Normative references
GB 196 General purpose metric screw threads - Basic dimensions
GB 197 General purpose screw threads - Tolerances and fits
GB 700 Ordinary carbon structural steel - Technical requirements
GB 978 Classification and technical conditions of malleable iron castings
GB 90 Acceptance inspection, marking and packaging of fasteners
GB 1237 Designation system for fasteners
3 Dimensions
Others
Table 1 mm
Note: Whenever possible, specifications in parentheses shall not be used.
4 Technical conditions
4.1 The thread is made in 6H (GB 196, GB 197).
4.2 Materials: Q215, Q235 (GB 700), KT30-6 (GB 987).
4.3 Acceptance inspection, marking and packaging shall be in accordance with the requirements of GB 90.
5 Designation
5.1 The designation method shall meet the requirements of GB 1237.
5.2 Example of designation
Type A wing nut with thread specification of D = M10, made of Q215, and not be subjected to surface treatment is designated as:
Nut GB 62 M10
