Language
M1.6
M2
M2.5
M3
(M3.5)
M4
M5
M6
M8
M10
M12
(M14)
M16
(M18)
M20
(M22)
M24
(M27)
M30
(M33)
M36
(M39)
M42
(M45)
M48
(M52)
M56
(M60)
M64
(Non-preferred) dimensions in parentheses.
GB /T 6170 - 2000
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*Models with different eras.
Choose materials based on density.(g/cm3)