Click Specification

double end studs (ASTM A354 / A449 / F593 / SAE J429)

ASME B 18.31.2 - 2008

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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
b_m	Nominal Size
	min
	max
u	max	UNC，NC-5
		UNF
		8UN
b	min	L≤10
		10＜L≤16
		L＞16
d_s	Full body,max
	Full body,min	UNC
		UNF
		8UN
d_s1	Reduced body,max	UNC
		UNF
		8UN
	Reduced body,min	UNC
		UNF
		8UN

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
0.375	0.469	0.563	0.656	0.750	0.844	0.938	1.125	1.313	1.500	1.688	1.875	2.063
0.350	0.440	0.532	0.620	0.708	0.802	0.892	1.075	1.258	1.438	1.625	1.813	2.000
0.400	0.498	0.594	0.692	0.792	0.896	0.983	1.175	1.368	1.562	1.750	1.938	2.125
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
0.071	0.083	0.083	0.100	0.100	0.111	0.111	0.125	0.143	0.167	0.167	0.167	0.167
-	-	-	-	-	-	-	-	-	-	0.250	0.250	0.250
0.750	0.875	1.000	1.125	1.250	1.375	1.500	1.750	2.000	2.250	2.500	2.750	3.000
1.000	1.125	1.250	1.375	1.500	1.625	1.750	2.000	2.250	2.500	2.750	3.000	3.250
1.500	1.625	1.750	1.875	2.000	2.125	2.250	2.500	2.750	3.000	3.250	3.500	3.750
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
0.241	0.303	0.364	0.426	0.488	0.550	0.611	0.735	0.859	0.983	1.106	1.231	1.354
0.243	0.304	0.367	0.428	0.491	0.552	0.615	0.739	0.863	0.987	1.112	1.237	1.362
-	-	-	-	-	-	-	-	-	-	1.108	1.233	1.358
0.241	0.303	0.364	0.426	0.488	0.550	0.611	0.735	0.859	0.983	1.106	1.231	1.354
0.243	0.304	0.367	0.428	0.491	0.552	0.615	0.739	0.863	0.987	1.112	1.237	1.362
-	-	-	-	-	-	-	-	-	-	1.108	1.233	1.358
0.213	0.271	0.329	0.385	0.444	0.502	0.559	0.677	0.795	0.910	1.023	1.148	1.256
0.223	0.281	0.343	0.400	0.462	0.521	0.583	0.703	0.822	0.938	1.063	1.188	1.313
-	-	-	-	-	-	-	-	-	-	1.035	1.160	1.284

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
b_m	Nominal Size
	min
	max
u	max	UNC，NC-5
		UNF
		8UN
b	min	L≤10
		10＜L≤16
		L＞16
d_s	Full body,max
	Full body,min	UNC
		UNF
		8UN
d_s1	Reduced body,max	UNC
		UNF
		8UN
	Reduced body,min	UNC
		UNF
		8UN

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
2.250	2.438	2.625	2.813	3.000	3.375	3.750	4.125	4.500	4.875	5.250	5.625	6.000
2.188	2.375	2.563	2.750	2.925	3.300	3.675	4.050	4.425	4.775	5.150	5.525	5.900
2.313	2.500	2.688	2.875	3.075	3.450	3.825	4.200	4.575	4.975	5.350	5.725	6.100
0.333	-	0.400	-	0.444	0.444	0.500	0.500	0.500	0.500	0.500	0.500	0.500
0.167	-	-	-	-	-	-	-	-	-	-	-	-
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
3.250	3.500	3.750	4.000	4.250	4.750	5.250	5.750	-	-	-	-	-
3.500	3.750	4.000	4.250	4.500	5.000	5.500	6.000	6.500	7.000	7.500	8.000	8.500
4.000	4.250	4.500	4.750	5.000	5.500	6.000	6.500	7.000	7.500	8.000	8.500	9.000
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
1.479	-	1.727	-	1.975	2.225	2.473	2.723	2.973	3.223	3.473	3.723	3.973
1.487	-	-	-	-	-	-	-	-	-	-	-	-
1.483	1.608	1.733	1.858	1.983	2.233	2.483	2.733	2.982	3.232	3.482	3.732	3.982
1.479	-	1.727	-	1.975	2.225	2.473	2.723	2.973	3.223	3.473	3.723	3.973
1.487	-	-	-	-	-	-	-	-	-	-	-	-
1.483	1.608	1.733	1.858	1.983	2.233	2.483	2.733	2.982	3.232	3.482	3.732	3.982
1.381	-	1.609	-	1.843	2.093	2.324	2.574	2.824	3.073	3.323	3.573	3.823
1.438	-	-	-	-	-	-	-	-	-	-	-	-
1.409	1.534	1.659	1.784	1.909	2.158	2.408	2.658	2.908	3.158	3.407	3.657	3.907

①,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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