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Hex Flange Screws [Table 8]（A394）

ASME B 18.2.1 - 2012

Display drawing:

Screw Thread 7/16 1/4 1/2 5/16 3/8 9/16 5/8 3/4
Thread Size 7/16 1/4 1/2 5/16 3/8 9/16 5/8 3/4
D 0.4375 0.25 0.5 0.3125 0.375 0.5625 0.625 0.75
PP UNC 14 20 13 18 16 12 11 10
PP UNF 20 28 20 24 24 18 18 16
Ds Max 0.4375 0.25 0.5 0.3125 0.378 0.5625 0.625 0.75
Ds Min 0.4305 0.245 0.493 0.3065 0.369 0.5545 0.617 0.741
S Max 0.625 0.375 0.75 0.5 0.5625 0.8125 0.9375 1.125
S Min 0.612 0.367 0.736 0.489 0.551 0.798 0.922 1.1
E Min 0.685 0.409 0.825 0.548 0.618 0.895 1.034 1.234
Dc Max 0.93 0.56 1.07 0.68 0.81 1.19 1.33 1.56
C Min 0.07 0.04 0.08 0.05 0.06 0.09 0.1 0.11
K Max 0.46 0.28 0.51 0.32 0.39 0.57 0.62 0.73
B L≤6 1.125 0.75 1.25 0.875 1 1.375 1.5 1.75
B L＞6 1.375 1 1.5 1.125 1.25 1.625 1.75 2
R Max 0.025 0.025 0.025 0.025 0.025 0.045 0.045 0.045
R Min 0.015 0.015 0.015 0.015 0.015 0.02 0.02 0.02