ASME B18.2.1 Hex Lag Screws

Scope

ASME B18.2.1 Hex Lag Screws dimension standard covers the dimensional requirements for product types of bolts and screws recognized as American National Standard. Also included are appendices covering gaging procedures, grade markings for bolts and screws, formulas on which dimensional data are based, and a specification to assist in identifying a product as being a screw or a bolt. Where questions arise concerning acceptance of product, the dimensions in the tables shall govern over recalculation by formula. Heavy hex structural bolts, formerly covered in ASME B18.2.1, are now covered in ASME B18.2.6, The Tables measurements are also converted into millimeters to make the information clearer and easier to to understand.

ASME B18.2.1 Hex Lag Screws Dimensions (mm)

Nominal Size or Basic Product Diameter		Body or Shoulder Diameter, E		Width Across Flats, F			Width Across Corners, G		Head Height, H			Minimum Shoulder Length, S	Radius of Fillet, R
Nominal Size or Basic Product Diameter		Max.	Min.	Basic	Max.	Min.	Max.	Min.	Basic	Max.	Min.	Minimum Shoulder Length, S	Max.	Min.
#10	4.826	5.055	4.521	7.144	7.137	6.883	8.204	7.849	3.175	3.556	2.794	2.388	0.762	0.254
1/4	6.350	6.604	6.020	11.113	11.125	10.795	12.827	12.294	4.366	4.775	3.810	2.388	0.762	0.254
5/16	7.938	8.230	7.569	12.700	12.700	12.294	14.656	14.021	5.556	5.969	4.953	3.175	0.762	0.254
3/8	9.525	9.855	9.144	14.288	14.275	13.818	16.510	15.748	6.350	6.807	5.740	3.175	0.762	0.254
7/16	11.113	11.481	10.693	15.875	15.875	15.316	18.339	17.450	7.541	8.026	6.909	3.962	0.762	0.254
1/2	12.700	13.081	12.243	19.050	19.050	18.415	21.996	20.980	8.731	9.246	7.671	3.962	0.762	0.254
5/8	15.875	16.307	15.367	23.813	23.825	23.012	27.508	26.238	10.716	11.278	9.601	7.925	1.524	0.508
3/4	19.050	19.507	18.517	28.575	28.575	27.635	32.995	31.496	12.700	13.310	11.557	9.525	1.524	0.508
7/8	22.225	22.733	21.641	33.338	33.325	32.233	38.506	36.754	14.684	15.342	13.487	9.525	1.524	0.508
1	25.400	25.959	24.790	38.100	38.100	36.830	43.993	41.986	17.066	17.780	15.011	15.875	2.286	0.762
1 1/8	28.575	29.185	27.889	42.863	42.875	41.427	49.505	47.219	19.050	19.812	16.713	15.875	2.286	0.762
1 1/4	31.750	32.436	31.064	47.625	47.625	46.025	54.991	52.476	21.431	22.250	19.025	15.875	2.286	0.762

ASME B18.2.1 Hex Lag Screws Length Tolerance (mm)

Nominal Length	Nominal Size (inches)
Nominal Length	1/4 to 3/8	7/16 and 1/2	9/16 to 3/4	7/8 and 1	1 1/8 to 1 1/2	Over 1 1/2
Up to 25.4 mm, incl.	+0.000 0.762	+0.000 0.762	+0.000 0.762	...	...	...
Over 25.4 mm to 63.5 mm, incl.	+0.000 1.016	+0.000 1.524	+0.000 2.032	+0.000 2.540	+0.000 3.048	+0.000 4.572
Over 63.5 mm to 101.6 mm, incl.	+0.000 1.524	+0.000 2.032	+0.000 2.540	+0.000 3.556	+0.000 4.064	+0.000 5.080
Over 101.6 mm to 152.4 mm, incl.	+0.000 2.540	+0.000 2.540	+0.000 2.540	+0.000 4.064	+0.000 4.572	+0.000 5.588
Longer than 152.4 mm	+0.000 4.572	+0.000 4.572	+0.000 4.572	+0.000 5.080	+0.000 5.588	+0.000 6.096

ASME B18.2.1 Hex Lag Screws Grip Gaging Lengths (mm)

Nominal Size	Nominal Length, Lg, max. / Lb, min.
	1-1/4		1-3/8		1-1/2		1-5/8		1-3/4		1-7/8		2		2-1/8		2-1/4		2-3/8		2-1/2		2-5/8		2-3/4		2-7/8		3		3-1/4		3-1/2		3-3/4		4		4-1/4		4-1/2		4-3/4		5		5-1/4		5-1/2		5-3/4		6		6-1/4		6-1/2		6-3/4		7		7-1/4		7-1/2		7-3/4		8		8-1/4		8-1/2		8-3/4		9		9-1/4		9-1/2		9-3/4		10		11		12
	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.
1/4	0.50	0.25	0.63	0.38	0.75	0.50	0.88	0.62	1.00	0.75	1.12	0.88	1.25	1.00	1.38	1.12	1.50	1.25	1.62	1.38	1.75	1.50	1.88	1.62	2.00	1.75	2.12	1.88	2.52	2.00	2.50	2.25	2.75	2.50	3.00	2.75	3.25	3.00	3.50	3.25	3.75	3.50	4.00	3.75	4.25	4.00	4.50	4.25	4.75	4.50	5.00	4.75	5.25	5.00	5.25	5.00	5.50	5.25	5.75	5.50	6.00	5.75	6.25	6.00	6.50	6.25	6.75	6.50	7.00	6.75	7.25	7.00	7.50	7.25	7.75	7.50	8.00	7.75	8.25	8.00	8.50	8.25	8.75	8.50	9.00	8.75	10.00	9.75	11.00	10.75
5/16	Full thread		0.50	0.22	0.62	0.35	0.75	0.47	0.88	0.60	1.00	0.72	1.12	0.85	1.25	0.97	1.38	1.10	1.50	1.22	1.62	1.35	1.75	1.47	1.88	1.60	2.00	1.72	2.12	1.85	2.38	2.10	2.62	2.35	2.88	2.60	3.12	2.85	3.38	3.10	3.62	3.35	3.88	3.60	4.12	3.85	4.38	4.10	4.62	4.35	4.88	4.60	5.12	4.85	5.12	4.85	5.38	5.10	5.62	5.35	5.88	5.60	6.12	5.85	6.38	6.10	6.62	6.35	6.88	6.60	7.12	6.85	7.38	7.10	7.62	7.35	7.88	7.60	8.12	7.85	8.38	8.10	8.62	8.35	8.88	8.60	9.88	9.60	10.88	10.60
3/8	Full thread		Full thread		0.50	0.19	0.62	0.31	0.75	0.44	0.88	0.56	1.00	0.69	1.12	0.81	1.25	0.94	1.38	1.06	1.50	1.19	1.62	1.31	1.75	1.44	1.88	1.56	2.00	1.69	2.25	1.94	2.50	2.19	2.75	2.44	3.00	2.69	3.25	2.94	3.50	3.19	3.75	3.44	4.00	3.69	4.25	3.94	4.50	4.19	4.75	4.44	5.00	4.69	5.00	4.69	5.25	4.94	5.50	5.19	5.75	5.44	6.00	5.69	6.25	5.94	6.50	6.19	6.75	6.44	7.00	6.69	7.25	6.94	7.50	7.19	7.75	7.44	8.00	7.69	8.25	7.94	8.50	8.19	8.75	8.44	9.75	9.44	10.75	10.44
7/16	Full thread		Full thread		Full thread		Full thread		0.63	0.27	0.75	0.39	0.88	0.52	1.00	0.64	1.12	0.77	1.25	0.89	1.38	1.02	1.50	1.14	1.62	1.27	1.75	1.39	1.88	1.52	2.12	1.77	2.38	2.02	2.62	2.27	2.88	2.52	3.12	2.77	3.38	3.02	3.62	3.27	3.88	3.52	4.12	3.77	4.38	4.02	4.63	4.27	4.88	4.52	4.88	4.52	5.12	4.77	5.38	5.02	5.62	5.27	5.88	5.52	6.12	5.77	6.38	6.02	6.62	6.27	6.88	6.52	7.12	6.77	7.38	7.02	7.62	7.27	7.88	7.52	8.12	7.77	8.38	8.02	8.62	8.27	9.62	9.27	10.62	10.27
1/2	Full thread		Full thread		Full thread		Full thread		Full thread		0.63	0.24	0.75	0.38	0.88	0.49	1.00	0.62	1.12	0.74	1.25	0.86	1.38	0.99	1.50	1.12	1.62	1.24	1.75	1.36	2.00	1.62	2.25	1.86	2.50	2.12	2.75	2.36	3.00	2.62	3.25	2.86	3.50	3.12	3.75	3.36	4.00	3.62	4.25	3.87	4.50	4.12	4.75	4.36	4.75	4.36	5.00	4.62	5.25	4.86	5.50	5.12	5.75	5.36	6.00	5.62	6.25	5.87	6.50	6.12	6.75	6.36	7.00	6.62	7.25	6.86	7.50	7.12	7.75	7.36	8.00	7.62	8.25	7.86	8.50	8.12	9.50	9.12	10.50	10.12
9/16	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		0.75	0.33	0.88	0.45	1.00	0.58	1.12	0.75	1.25	0.83	1.38	0.96	1.50	1.08	1.62	1.21	1.88	1.46	2.12	1.71	2.38	1.96	2.62	2.21	2.88	2.46	3.12	2.71	3.38	2.96	3.62	3.21	3.88	3.46	4.12	3.71	4.38	3.96	4.62	4.21	4.62	4.21	4.88	4.46	5.12	4.71	5.38	4.96	5.62	5.20	5.88	5.46	6.12	5.71	6.38	5.96	6.62	6.21	6.88	6.46	7.12	6.71	7.38	6.96	7.62	7.21	7.88	7.46	8.12	7.71	8.38	7.96	9.38	8.96	10.38	9.96
5/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		0.75	0.30	0.88	0.42	1.00	0.55	1.12	0.67	1.25	0.80	1.38	0.92	1.50	1.05	1.75	1.30	2.00	1.55	2.25	1.80	2.50	2.05	2.75	2.30	3.00	2.55	3.25	2.80	3.50	3.05	3.75	3.30	4.00	3.55	4.25	3.80	4.50	4.05	4.50	4.05	4.75	4.30	5.00	4.55	5.25	4.80	5.50	5.05	5.75	5.30	6.00	5.55	6.25	5.80	6.50	6.05	6.75	6.30	7.00	6.55	7.25	6.80	7.50	7.05	7.75	7.30	8.00	7.55	8.25	7.80	9.25	8.80	10.25	9.80
3/4	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.12	0.67	1.25	0.80	1.38	0.92	1.50	1.05	1.50	1.00	1.75	1.25	2.00	1.50	2.25	1.75	2.50	2.00	2.75	2.25	3.00	2.50	3.25	2.75	3.50	3.00	3.75	3.25	4.00	3.50	4.25	3.75	4.25	3.75	4.50	4.00	4.75	4.25	5.00	4.50	5.25	4.75	5.50	5.00	5.75	5.25	6.00	5.50	6.25	5.75	6.50	6.00	6.75	6.25	7.00	6.50	7.25	6.75	7.50	7.00	7.75	7.25	8.00	7.50	9.00	8.50	10.00	9.50
7/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.00	0.50	1.12	0.62	1.25	0.75	1.25	0.69	1.50	0.94	1.75	1.19	2.00	1.44	2.25	1.69	2.50	1.94	2.75	2.19	3.00	2.44	3.25	2.69	3.50	2.94	3.75	3.19	4.00	3.44	4.00	3.44	4.25	3.69	4.50	3.94	4.75	4.19	5.00	4.44	5.25	4.69	5.50	4.94	5.75	5.19	6.00	5.44	6.25	5.69	6.50	5.94	6.75	6.19	7.00	6.44	7.25	6.89	7.50	6.94	7.75	7.19	8.75	8.19	9.75	9.19
1	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		0.88	0.32	1.00	0.44	1.00	0.38	1.25	0.62	1.50	0.88	1.75	1.12	2.00	1.38	2.25	1.62	2.50	1.88	2.75	2.12	3.00	2.38	3.25	2.62	3.50	2.88	3.75	3.12	3.75	3.12	4.00	3.38	4.25	3.63	4.50	3.88	4.75	4.12	5.00	4.38	5.25	4.52	5.50	4.88	5.75	5.12	6.00	5.38	6.25	5.62	6.50	5.88	6.75	6.12	7.00	6.38	7.25	6.62	7.50	6.88	8.50	7.88	9.50	8.88
1-1/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.25	0.54	1.50	0.79	1.75	1.04	2.00	1.29	2.25	1.54	2.50	1.79	2.75	2.04	3.00	2.29	3.25	2.54	3.50	2.79	3.50	2.79	3.75	3.04	4.00	3.29	4.25	3.54	4.50	3.79	4.75	4.04	5.00	4.29	5.25	4.54	5.50	4.79	5.75	5.04	6.00	5.29	6.25	5.54	6.50	5.79	6.75	6.04	7.00	6.29	7.25	6.54	8.25	7.54	9.25	8.54
1-1/4	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.25	0.54	1.50	0.79	1.75	1.04	2.00	1.29	2.25	1.54	2.50	1.79	2.75	2.04	3.00	2.29	3.25	2.54	3.25	2.54	3.50	2.79	3.75	3.04	4.00	3.29	4.25	3.54	4.50	3.79	4.75	4.04	5.00	4.29	5.25	4.54	5.50	4.79	5.75	5.04	6.00	5.29	6.25	5.54	6.50	5.79	6.75	6.04	7.00	6.29	8.00	7.29	9.00	8.29
1-3/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.50	0.79	1.75	1.04	2.00	1.29	2.25	1.54	2.50	1.79	2.75	2.04	3.00	2.29	3.25	2.54	3.25	2.54	3.50	2.79	3.75	3.04	4.00	3.29	4.25	3.54	4.50	3.79	4.75	4.04	5.00	4.29	5.25	4.54	5.50	4.79	5.75	5.04	6.00	5.29	6.25	5.54	6.50	5.79	6.75	6.04	7.75	7.04	8.75	8.04
1-1/2	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		1.50	0.67	1.75	0.92	2.00	1.17	2.25	1.42	2.50	1.67	2.75	1.92	2.75	1.92	3.00	2.17	3.25	2.42	3.50	2.67	3.75	2.92	4.00	3.17	4.25	3.42	4.50	3.67	4.75	3.92	5.00	4.17	5.25	4.42	5.50	4.67	5.75	4.92	6.00	5.17	6.25	5.42	6.50	5.67	7.50	6.67	8.50	7.67

ASME B18.2.1 Hex Lag Screws Dimensions (Inch)

Nominal Size or Basic Product Diameter		Body or Shoulder Diameter, E		Width Across Flats, F			Width Across Corners, G		Head Height, H			Minimum Shoulder Length, S	Radius of Fillet, R
Nominal Size or Basic Product Diameter		Max.	Min.	Basic	Max.	Min.	Max.	Min.	Basic	Max.	Min.	Minimum Shoulder Length, S	Max.	Min.
#10	0.1900	0.199	0.178	9/32	0.281	0.271	0.323	0.309	1/8	0.140	0.110	0.094	0.03	0.01
1/4	0.2500	0.260	0.237	7/16	0.438	0.425	0.505	0.484	11/64	0.188	0.150	0.094	0.03	0.01
5/16	0.3125	0.324	0.298	1/2	0.500	0.484	0.577	0.552	7/32	0.235	0.195	0.125	0.03	0.01
3/8	0.3750	0.388	0.360	9/16	0.562	0.544	0.650	0.620	1/4	0.268	0.226	0.125	0.03	0.01
7/16	0.4375	0.452	0.421	5/8	0.625	0.603	0.722	0.687	19/64	0.316	0.272	0.156	0.03	0.01
1/2	0.5000	0.515	0.482	3/4	0.750	0.725	0.866	0.826	11/32	0.364	0.302	0.156	0.03	0.01
5/8	0.6250	0.642	0.605	15/16	0.938	0.906	1.083	1.033	27/64	0.444	0.378	0.312	0.06	0.02
3/4	0.7500	0.768	0.729	1 1/8	1.125	1.088	1.299	1.240	1/2	0.524	0.455	0.375	0.06	0.02
7/8	0.8750	0.895	0.852	1 5/16	1.312	1.269	1.516	1.447	37/64	0.604	0.531	0.375	0.06	0.02
1	1.0000	1.022	0.976	1 1/2	1.500	1.450	1.732	1.653	43/64	0.700	0.591	0.625	0.09	0.03
1 1/8	1.1250	1.149	1.098	1 11/16	1.688	1.631	1.949	1.859	3/4	0.780	0.658	0.625	0.09	0.03
1 1/4	1.2500	1.277	1.223	1 7/8	1.875	1.812	2.165	2.066	27/32	0.876	0.749	0.625	0.09	0.03

ASME B18.2.1 Hex Lag Screws Length Tolerance (Inch)

Nominal Length	Nominal Size
Nominal Length	1/4 to 3/8	7/16 and 1/2	9/16 to 3/4	7/8 and 1	1 1/8 to 1 1/2	Over 1 1/2
Up to 1 in., incl.	+0.00 0.03	+0.00 0.03	+0.00 0.03	...	...	...
Over 1 in. to 2 1/2 in., incl.	+0.00 0.04	+0.00 0.06	+0.00 0.08	+0.00 0.10	+0.00 0.12	+0.00 0.18
Over 2 1/2 in. to 4 in., incl.	+0.00 0.06	+0.00 0.08	+0.00 0.10	+0.00 0.14	+0.00 0.16	+0.00 0.20
Over 4 in. to 6 in., incl.	+0.00 0.10	+0.00 0.10	+0.00 0.10	+0.00 0.16	+0.00 0.18	+0.00 0.22
Longer than 6 in.	+0.00 0.18	+0.00 0.18	+0.00 0.18	+0.00 0.20	+0.00 0.22	+0.00 0.24

ASME B18.2.1 Hex Lag Screws Grip Gaging Lengths (Inch)

Nominal Size	Nominal Length, Lg, max. / Lb, min.
	1-1/4		1-3/8		1-1/2		1-5/8		1-3/4		1-7/8		2		2-1/8		2-1/4		2-3/8		2-1/2		2-5/8		2-3/4		2-7/8		3		3-1/4		3-1/2		3-3/4		4		4-1/4		4-1/2		4-3/4		5		5-1/4		5-1/2		5-3/4		6		6-1/4		6-1/2		6-3/4		7		7-1/4		7-1/2		7-3/4		8		8-1/4		8-1/2		8-3/4		9		9-1/4		9-1/2		9-3/4		10		11		12
	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.	L_g Max.	L_b Min.
1/4	12.70	6.35	16.00	9.65	19.05	12.70	22.35	15.75	25.40	19.05	28.45	22.35	31.75	25.40	35.05	28.45	38.10	31.75	41.15	35.05	44.45	38.10	47.75	41.15	50.80	44.45	53.85	47.75	64.01	50.80	63.50	57.15	69.85	63.50	76.20	69.85	82.55	76.20	88.90	82.55	95.25	88.90	101.60	95.25	107.95	101.60	114.30	107.95	120.65	114.30	127.00	120.65	133.35	127.00	133.35	127.00	139.70	133.35	146.05	139.70	152.40	146.05	158.75	152.40	165.10	158.75	171.45	165.10	177.80	171.45	184.15	177.80	190.50	184.15	196.85	190.50	203.20	196.85	209.55	203.20	215.90	209.55	222.25	215.90	228.60	222.25	254.00	247.65	279.40	273.05
5/16	Full thread		12.70	5.59	15.75	8.89	19.05	11.94	22.35	15.24	25.40	18.29	28.45	21.59	31.75	24.64	35.05	27.94	38.10	30.99	41.15	34.29	44.45	37.34	47.75	40.64	50.80	43.69	53.85	46.99	60.45	53.34	66.55	59.69	73.15	66.04	79.25	72.39	85.85	78.74	91.95	85.09	98.55	91.44	104.65	97.79	111.25	104.14	117.35	110.49	123.95	116.84	130.05	123.19	130.05	123.19	136.65	129.54	142.75	135.89	149.35	142.24	155.45	148.59	162.05	154.94	168.15	161.29	174.75	167.64	180.85	173.99	187.45	180.34	193.55	186.69	200.15	193.04	206.25	199.39	212.85	205.74	218.95	212.09	225.55	218.44	250.95	243.84	276.35	269.24
3/8	Full thread		Full thread		12.70	4.83	15.75	7.87	19.05	11.18	22.35	14.22	25.40	17.53	28.45	20.57	31.75	23.88	35.05	26.92	38.10	30.23	41.15	33.27	44.45	36.58	47.75	39.62	50.80	42.93	57.15	49.28	63.50	55.63	69.85	61.98	76.20	68.33	82.55	74.68	88.90	81.03	95.25	87.38	101.60	93.73	107.95	100.08	114.30	106.43	120.65	112.78	127.00	119.13	127.00	119.13	133.35	125.48	139.70	131.83	146.05	138.18	152.40	144.53	158.75	150.88	165.10	157.23	171.45	163.58	177.80	169.93	184.15	176.28	190.50	182.63	196.85	188.98	203.20	195.33	209.55	201.68	215.90	208.03	222.25	214.38	247.65	239.78	273.05	265.18
7/16	Full thread		Full thread		Full thread		Full thread		16.00	6.86	19.05	9.91	22.35	13.21	25.40	16.26	28.45	19.56	31.75	22.61	35.05	25.91	38.10	28.96	41.15	32.26	44.45	35.31	47.75	38.61	53.85	44.96	60.45	51.31	66.55	57.66	73.15	64.01	79.25	70.36	85.85	76.71	91.95	83.06	98.55	89.41	104.65	95.76	111.25	102.11	117.60	108.46	123.95	114.81	123.95	114.81	130.05	121.16	136.65	127.51	142.75	133.86	149.35	140.21	155.45	146.56	162.05	152.91	168.15	159.26	174.75	165.61	180.85	171.96	187.45	178.31	193.55	184.66	200.15	191.01	206.25	197.36	212.85	203.71	218.95	210.06	244.35	235.46	269.75	260.86
1/2	Full thread		Full thread		Full thread		Full thread		Full thread		16.00	6.10	19.05	9.65	22.35	12.45	25.40	15.75	28.45	18.80	31.75	21.84	35.05	25.15	38.10	28.45	41.15	31.50	44.45	34.54	50.80	41.15	57.15	47.24	63.50	53.85	69.85	59.94	76.20	66.55	82.55	72.64	88.90	79.25	95.25	85.34	101.60	91.95	107.95	98.30	114.30	104.65	120.65	110.74	120.65	110.74	127.00	117.35	133.35	123.44	139.70	130.05	146.05	136.14	152.40	142.75	158.75	149.10	165.10	155.45	171.45	161.54	177.80	168.15	184.15	174.24	190.50	180.85	196.85	186.94	203.20	193.55	209.55	199.64	215.90	206.25	241.30	231.65	266.70	257.05
9/16	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		19.05	8.38	22.35	11.43	25.40	14.73	28.45	19.05	31.75	21.08	35.05	24.38	38.10	27.43	41.15	30.73	47.75	37.08	53.85	43.43	60.45	49.78	66.55	56.13	73.15	62.48	79.25	68.83	85.85	75.18	91.95	81.53	98.55	87.88	104.65	94.23	111.25	100.58	117.35	106.93	117.35	106.93	123.95	113.28	130.05	119.63	136.65	125.98	142.75	132.08	149.35	138.68	155.45	145.03	162.05	151.38	168.15	157.73	174.75	164.08	180.85	170.43	187.45	176.78	193.55	183.13	200.15	189.48	206.25	195.83	212.85	202.18	238.25	227.58	263.65	252.98
5/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		19.05	7.62	22.35	10.67	25.40	13.97	28.45	17.02	31.75	20.32	35.05	23.37	38.10	26.67	44.45	33.02	50.80	39.37	57.15	45.72	63.50	52.07	69.85	58.42	76.20	64.77	82.55	71.12	88.90	77.47	95.25	83.82	101.60	90.17	107.95	96.52	114.30	102.87	114.30	102.87	120.65	109.22	127.00	115.57	133.35	121.92	139.70	128.27	146.05	134.62	152.40	140.97	158.75	147.32	165.10	153.67	171.45	160.02	177.80	166.37	184.15	172.72	190.50	179.07	196.85	185.42	203.20	191.77	209.55	198.12	234.95	223.52	260.35	248.92
3/4	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		28.45	17.02	31.75	20.32	35.05	23.37	38.10	26.67	38.10	25.40	44.45	31.75	50.80	38.10	57.15	44.45	63.50	50.80	69.85	57.15	76.20	63.50	82.55	69.85	88.90	76.20	95.25	82.55	101.60	88.90	107.95	95.25	107.95	95.25	114.30	101.60	120.65	107.95	127.00	114.30	133.35	120.65	139.70	127.00	146.05	133.35	152.40	139.70	158.75	146.05	165.10	152.40	171.45	158.75	177.80	165.10	184.15	171.45	190.50	177.80	196.85	184.15	203.20	190.50	228.60	215.90	254.00	241.30
7/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		25.40	12.70	28.45	15.75	31.75	19.05	31.75	17.53	38.10	23.88	44.45	30.23	50.80	36.58	57.15	42.93	63.50	49.28	69.85	55.63	76.20	61.98	82.55	68.33	88.90	74.68	95.25	81.03	101.60	87.38	101.60	87.38	107.95	93.73	114.30	100.08	120.65	106.43	127.00	112.78	133.35	119.13	139.70	125.48	146.05	131.83	152.40	138.18	158.75	144.53	165.10	150.88	171.45	157.23	177.80	163.58	184.15	170.18	190.50	176.28	196.85	182.63	222.25	208.03	247.65	233.43
1	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		22.35	8.13	25.40	11.18	25.40	9.65	31.75	15.75	38.10	22.35	44.45	28.45	50.80	35.05	57.15	41.15	63.50	47.75	69.85	53.85	76.20	60.45	82.55	66.55	88.90	73.15	95.25	79.25	95.25	79.25	101.60	85.85	107.95	92.20	114.30	98.55	120.65	104.65	127.00	111.25	133.35	117.60	139.70	123.95	146.05	130.05	152.40	136.65	158.75	142.75	165.10	149.35	171.45	155.45	177.80	162.05	184.15	168.15	190.50	174.75	215.90	200.15	241.30	225.55
1-1/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		31.75	13.72	38.10	20.07	44.45	26.42	50.80	32.77	57.15	39.12	63.50	45.47	69.85	51.82	76.20	58.17	82.55	64.52	88.90	70.87	88.90	70.87	95.25	77.22	101.60	83.57	107.95	89.92	114.30	96.27	120.65	102.62	127.00	108.97	133.35	115.32	139.70	121.67	146.05	128.02	152.40	134.37	158.75	140.72	165.10	147.07	171.45	153.42	177.80	159.77	184.15	166.12	209.55	191.52	234.95	216.92
1-1/4	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		31.75	13.72	38.10	20.07	44.45	26.42	50.80	32.77	57.15	39.12	63.50	45.47	69.85	51.82	76.20	58.17	82.55	64.52	82.55	64.52	88.90	70.87	95.25	77.22	101.60	83.57	107.95	89.92	114.30	96.27	120.65	102.62	127.00	108.97	133.35	115.32	139.70	121.67	146.05	128.02	152.40	134.37	158.75	140.72	165.10	147.07	171.45	153.42	177.80	159.77	203.20	185.17	228.60	210.57
1-3/8	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		38.10	20.07	44.45	26.42	50.80	32.77	57.15	39.12	63.50	45.47	69.85	51.82	76.20	58.17	82.55	64.52	82.55	64.52	88.90	70.87	95.25	77.22	101.60	83.57	107.95	89.92	114.30	96.27	120.65	102.62	127.00	108.97	133.35	115.32	139.70	121.67	146.05	128.02	152.40	134.37	158.75	140.72	165.10	147.07	171.45	153.42	196.85	178.82	222.25	204.22
1-1/2	Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		Full thread		38.10	17.02	44.45	23.37	50.80	29.72	57.15	36.07	63.50	42.42	69.85	48.77	69.85	48.77	76.20	55.12	82.55	61.47	88.90	67.82	95.25	74.17	101.60	80.52	107.95	86.87	114.30	93.22	120.65	99.57	127.00	105.92	133.35	112.27	139.70	118.62	146.05	124.97	152.40	131.32	158.75	137.67	165.10	144.02	190.50	169.42	215.90	194.82

ASME Material Specifications

ASTM A193/A193M Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High Temperature or High Pressure Service and Other Special Purpose Applications
ASTM A307 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
ASTM A449 Standard Specification for Hex Cap Screws, Bolts and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength
ASTM A453/A453M Standard Specification for Bolting, Stud Bolts, Screws, Nuts
ASTM A354 Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners
ASTM A320 Standard Specification for Alloy-Steel and Stainless Steel Bolting for Low-Temperature Service
ASTM A1082/A1082M Standard Specification for Bolting, Stud Bolts, Screws, Nuts
ASTM A1014/A1014M Standard Specification for UNS N07718 Bolting, Stud Bolts, Screws, Nuts
ASTM F468 Standard Specification for Nonferrous Bolts, Hex Cap Screws, and Studs
ASTM F593 Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and Studs
ASTM F901 Aluminium Transmission Tower Bolts
ASTM F738 Stud Bolts, Screws
ASTM F1554 Anchor Bolts, Anchor Rods
ASTM F2281 Bolting, Stud Bolts, Screws, Hex Cap Screws, Threaded Rods
ASTM F3125 Heavy Hex Bolts, Screws, Studs