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Continuous Thread Stud（A193 / A320 / A437 / A453/A540/A1014）(Inch Series) [Table 1]

ASME B 18.31.2 - 2014

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Thread Size
d

1/4

5/16

3/8

7/16

1/2

9/16

5/8

3/4

7/8

1-1/8

1-1/4

1-3/8

d
PP	UNC
	UNF
	8UN
U	UNC	min
		max
	UNF	min
		max
	8UN	min
		max

0.2500	0.3125	0.3750	0.4375	0.5000	0.5625	0.6250	0.7500	0.8750	1.0000	1.1250	1.2500	1.3750
20	18	16	14	13	12	11	10	9	8	7	7	6
28	24	24	20	20	18	18	16	14	12	12	12	12
-	-	-	-	-	-	-	-	-	-	8	8	8
0.050	0.056	0.063	0.072	0.077	0.084	0.091	0.100	0.111	0.125	0.143	0.143	0.167
0.100	0.111	0.125	0.143	0.154	0.167	0.182	0.200	0.222	0.250	0.286	0.286	0.333
0.036	0.042	0.042	0.050	0.050	0.056	0.056	0.063	0.072	0.084	0.084	0.084	0.084
0.071	0.083	0.083	0.100	0.100	0.111	0.111	0.125	0.143	0.167	0.167	0.167	0.167
-	-	-	-	-	-	-	-	-	-	0.125	0.125	0.125
-	-	-	-	-	-	-	-	-	-	0.250	0.250	0.250

Thread Size
d

1-1/2

1-5/8

1-3/4

1-7/8

2-1/4

2-1/2

2-3/4

3-1/4

3-1/2

3-3/4

d
PP	UNC
	UNF
	8UN
U	UNC	min
		max
	UNF	min
		max
	8UN	min
		max

1.5000	1.6250	1.7500	1.8750	2.0000	2.2500	2.5000	2.7500	3.0000	3.2500	3.5000	3.7500	4.0000
6	-	5	-	4 1/2	4 1/2	4	4	4	4	4	4	4
12	-	-	-	-	-	-	-	-	-	-	-	-
8	8	8	8	8	8	8	8	8	8	8	8	8
0.167	-	0.200	-	0.222	0.222	0.250	0.250	0.250	0.250	0.250	0.250	0.250
0.333	-	0.400	-	0.444	0.444	0.500	0.500	0.500	0.500	0.500	0.500	0.500
0.084	-	-	-	-	-	-	-	-	-	-	-	-
0.167	-	-	-	-	-	-	-	-	-	-	-	-
0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125	0.125
0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250	0.250

①,U —— Chamfered Thread Distance:
Stud ends shall be chamfered from the major diameter to a diameter equal to or less than the thread root diameter. The length of the chamfered end to the first full formed thread at major diameter, as determined by the distance the chamfered end enters into a cylindrical NOT GO major diameter ring gage, shall be one to two thread pitches on each end. The ends of the stud shall be reasonably square with the axis of the stud, but the slight rim or cup resulting from manufacturing shall be permissible. The ends shall be suitable for marking.

Alternative history

ASME B 18.31.2 - 2008 ASME B 18.31.2 - 2014

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