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Screws with British Standard Whitworth Threads (rationalized series)

AS /NZS 2451 - 1998

Display drawing:

Screw Thread 1-5/8 1-3/4 3/8 1-1/2 2 3/4 7/8 1 1-1/8 1-3/8 1/4 7/16 1/2 5/8 5/16 1-1/4
D 1.625 1.75 0.75 1.5 2 0.75 0.875 1 1.125 1.375 0.25 0.438 0.5 0.625 0.313 1.25
P BSW 5 5 16 6 4.5 10 9 8 7 6 20 14 12 11 18 7
S Max 2.41 2.58 0.6 2.22 2.76 1.2 1.3 1.48 1.67 2.05 0.445 0.71 0.82 1.01 0.525 1.86
S Min 2.365 2.52 0.585 2.175 2.7 1.175 1.27 1.45 1.64 2.005 0.435 0.695 0.8 0.985 0.515 1.815
E Min 2.7 2.87 0.69 2.48 3.08 1.34 1.45 1.65 1.87 2.29 0.51 0.82 0.95 1.12 0.61 2.07
R Min 1/8 1/8 1/32 1/8 1/8 3/64 1/16 1/16 1/8 1/8 1/32 1/32 1/32 3/64 1/32 1/8
K Max 1.18 1.27 0.27 1.06 1.43 0.53 0.623 0.706 0.79 0.98 0.186 0.312 0.363 0.447 0.228 0.89
K Min 1.08 1.17 0.25 1 1.33 0.5 0.583 0.666 0.75 0.92 0.166 0.292 0.333 0.417 0.208 0.83