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Hex Flange Screws [Table 8]

ASME B 18.2.1 (T8) - 2010

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^*Models with different eras.

Thread Size
d

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

PP	UNC
PP	UNF
d_s	max
d_s	min
s	Basic
	max
	min
e	max
e	min
d_c	max
c	min
k	max
b	L≤6
b	L＞6
r	max
r	min

20	18	16	14	13	12	11	10
28	24	24	20	20	18	18	16
0.25	0.3125	0.375	0.4375	0.5	0.5625	0.625	0.75
0.245	0.3065	0.369	0.4305	0.493	0.5545	0.617	0.741
3/8	1/2	9/16	5/8	3/4	13/16	15/16	1-1/8
0.375	0.5	0.5625	0.625	0.75	0.8125	0.9375	1.125
0.367	0.489	0.551	0.612	0.736	0.798	0.922	1.1
0.433	0.577	0.65	0.722	0.866	0.938	1.083	1.299
0.409	0.548	0.618	0.685	0.825	0.895	1.034	1.234
0.56	0.68	0.81	0.93	1.07	1.19	1.33	1.59
0.04	0.05	0.06	0.07	0.08	0.09	0.1	0.11
0.28	0.32	0.39	0.46	0.51	0.57	0.62	0.73
0.75	0.875	1	1.125	1.25	1.375	1.5	1.75
1	1.125	1.25	1.375	1.5	1.625	1.75	2
0.025	0.025	0.025	0.025	0.025	0.045	0.045	0.045
0.015	0.025	0.025	0.025	0.025	0.020	0.020	0.020

Alternative history

ASME B 18.2.1T8 - 2010 ASME B 18.2.1T8 - 2012

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