ASME B18.2.1 Hex Lag Screws

Nomianal 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
Nomianal Size or Basic product Diameter		Max.	Min.	Max.	Min.	Max.	Min.	Max.	Min.	Minimum Shoulder Length, S	Max.	Min.
No. 10	0.1900	0.199	0.178	0.281	0.271	0.323	0.309	0.140	0.110	0.094	0.03	0.01
1/4	0.2500	0.260	0.237	0.438	0.425	0.505	0.484	0.188	0.150	0.094	0.03	0.01
5/16	0.3125	0.324	0.298	0.500	0.484	0.577	0.552	0.235	0.195	0.125	0.03	0.01
3/8	0.3750	0.388	0.360	0.562	0.544	0.650	0.620	0.268	0.226	0.125	0.03	0.01
7/16	0.4375	0.452	0.421	0.625	0.603	0.722	0.687	0.316	0.272	0.156	0.03	0.01
1/2	0.5000	0.515	0.482	0.750	0.725	0.866	0.826	0.364	0.302	0.156	0.03	0.01
5/8	0.6250	0.642	0.605	0.938	0.906	1.083	1.033	0.444	0.378	0.312	0.06	0.02
3/4	0.7500	0.768	0.729	1.125	1.088	1.299	1.240	0.524	0.455	0.375	0.06	0.02
7/8	0.8750	0.895	0.852	1.312	1.269	1.516	1.447	0.604	0.531	0.375	0.06	0.02
1	1.0000	1.022	0.976	1.500	1.450	1.732	1.653	0.700	0.591	0.625	0.09	0.03
1 1/8	1.1250	1.149	1.098	1.688	1.631	1.949	1.859	0.780	0.658	0.625	0.09	0.03
1 1/4	1.2500	1.277	1.223	1.875	1.812	2.165	2.066	0.876	0.749	0.625	0.09	0.03