This part specifies Type A or Type B wing nuts with thread specification from M2 to M24, proof torque Grade I (for steel, iron or stainless steel) or Grade II (for brass), made by steel, malleable cast iron, stainless steel or brass, and two wings in semicircular.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of GB/T 62. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 90.1 Fasteners — Acceptance inspection (GB/T 90.1-2002, idt ISO 3269:2000)
GB/T 90.2 Fasteners — Marking and packaging
GB/T 193 (GB/T 193-2003, ISO 261:1998, ISO general purpose metric screw threads — General plan, MOD)
GB/T 700 Carbon structural steels
GB/T 978 The classification and technical specification of malleable iron castings
GB/T 1220 Stainless steel bars
GB/T 1237-2000 Designation system for fasteners (GB/T 1237-2000, eqv ISO 8991:1986)
