mm mm mm mm mm 螺距mm mm 螺距mm mm 螺距mm mm 螺距mm 3 0.5 3 0.35 No.5 40 No.5 44 1/8" 40 3.175 0.635 3.175 0.5773 3.175 0.635 4 0.7 4 0.5 No.8 32 No.8 36 4.1656 0.7938 4.1656 0.7056 3/16" 24 3/16" 32 4.7625 1.0583 4.7625 0.7938 No.10 24 No.10 32 4.8260 1.0583 4.8260 0.7938 5 0.8 5 0.5 6 1 6 0.5 1/4" 20 1/4" 28 1/4" 20 1/4" 26 6.35 1.27 6.35 0.9071 6.35 1.27 6.35 0.9769 5/16" 18 5/16" 24 5/16" 18