ASME B18.16.6 Style NE Nylon Insert Locknut Dimensions

Designation		Width Across Flats, A		Minimum Width Across Corners, B	Thickness, C		Minimum Hex Height, D	Maximum Runout of Bearing Surface With Thread P.D. FIM
Size	Nominal Diameter	Max.	Min.	Minimum Width Across Corners, B	Max.	Min.	Minimum Hex Height, D	Maximum Runout of Bearing Surface With Thread P.D. FIM
¼	0.2500	0.439	0.430	0.482	0.328	0.298	0.225	0.010
5⁄16	0.3125	0.502	0.489	0.552	0.359	0.329	0.250	0.011
⅜	0.3750	0.564	0.551	0.622	0.468	0.438	0.335	0.012
7⁄16	0.4375	0.627	0.616	0.698	0.468	0.438	0.324	0.013
½	0.5000	0.752	0.736	0.837	0.609	0.579	0.464	0.014
9⁄16	0.5625	0.877	0.861	0.978	0.656	0.626	0.469	0.015
⅝	0.6250	0.940	0.922	1.051	0.765	0.735	0.593	0.016
¾	0.7500	1.064	1.052	1.191	0.890	0.860	0.742	0.018
⅞	0.8750	1.252	1.239	1.403	0.999	0.969	0.790	0.020
1	1.0000	1.440	1.427	1.615	1.078	1.016	0.825	0.022
1¹/₈	1.1250	1.627	1.614	1.826	1.203	1.141	0.930	0.025
1¼	1.2500	1.815	1.801	2.038	1.422	1.360	1.125	0.028
1⅜	1.3750	2.008	1.973	2.232	1.609	1.547	1.282	0.031
1½	1.5000	2.197	2.159	2.444	1.640	1.578	1.313	0.034