Flange 12-point screws IFI 115, inch series

                                      

Dimensions in inches - source IFI 115 table 1 Flange 12-points screws
Publication date: 2007  Supersedes IFI 115: 2002
d Thread size	F min		G min	C		E min	H max	K min	J min	M max	La	LT basic
	Min	Max		min	max
1/4	0.244	0.252	0.278	0.365	0.375	0.243	0.260	0.058	0.15	0.014	0.087	0.75
5/16	0.306	0.315	0.348	0.457	0.469	0.305	0.312	0.074	0.18	0.017	0.087	0.875
3/8	0.368	0.377	0.420	0.550	0.562	0.367	0.375	0.095	0.21	0.020	0.087	1
7/16	0.429	0.438	0.489	0.642	0.656	0.429	0.438	0.109	0.26	0.023	0.087	1.125
1/2	0.493	0.502	0.562	0.735	0.750	0.491	0.5	0.129	0.29	0.026	0.087	1.25
9/16	0.555	0.564	0.633	0.828	0.844	0.553	0.563	0.145	0.33	0.029	0.157	0.42
5/8	0.618	0.623	0.705	0.921	0.938	0.616	0.625	0.166	0.36	0.032	0.157	1.5
3/4	0.743	0.752	0.847	1.107	1.125	0.740	0.750	0.2	0.44	0.039	0.157	1.75
7/8	0.866	0.877	0.987	1.293	1.312	0.864	0.875	0.234	0.51	0.044	0.227	2
1	0.991	1.003	1.13	1.479	1.500	0.988	1	0.268	0.60	0.050	0.322	2.25
1-1/8	1.115	1.128	1.271	1.665	1.688	1.108	1.125	0.31	0.66	0.055	0.332	2.5
1-1/4	1.24	1.253	1.414	1.852	1.875	1.233	1.25	0.35	0.73	0.060	0.332	2.75
1-3/8	1.365	1.378	1.556	2.038	2.062	1.356	1.375	0.39	0.80	0.065	0.332	3
1-1/2	1.489	1.503	1.697	2.224	2.250	1.481	1.5	0.433	0.87	0.070	0.332	3.25