เกลียวตลอด ASTM A193

D (DIAMETER) M12 M14 M16 M20 M22 M24 M27 M30 M36 M42 M48
P (PICTH) 1.75 2.0 2.0 2.5 2.5 3.0 3.0 3.5 4.0 4.5 5.0
M (HEAD THICKNESS) 12 14 17 20 23 24 27 30 36 42 48
B (WIDTH ACROSS FLAT)  21 24 27 34 36 41 46 50 60 70 80
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