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JIS B 1051 is the Japanese equivalent of . It establishes the physical and mechanical properties of fasteners when tested at ambient temperatures ranging from 10°C to 35°C . This standard applies to: Metric Threads : Coarse and fine pitch threads. Size Range : Generally M1.6 to M39. I can’t help find or provide pirated copies
The strength of the fastener is indicated by a two-digit code (e.g., 8.8, 10.9, 12.9). Specifies the nominal tensile strength in Second Digit ( ×10cross 10 For official use, purchase the standard from the