ASME B18.16.6 Style NTE 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	0.218	0.188	0.125	0.010
5⁄16	0.3125	0.502	0.492	0.552	0.265	0.235	0.158	0.011
⅜	0.3750	0.564	0.553	0.622	0.281	0.251	0.150	0.012
7⁄16	0.4375	0.627	0.615	0.694	0.328	0.298	0.225	0.013
½	0.5000	0.752	0.741	0.837	0.328	0.298	0.190	0.014
9⁄16	0.5625	0.877	0.865	0.978	0.374	0.344	0.225	0.015
⅝	0.6250	0.940	0.928	1.051	0.406	0.376	0.265	0.016
¾	0.7500	1.064	1.052	1.191	0.421	0.391	0.288	0.018
⅞	0.8750	1.252	1.239	1.403	0.484	0.454	0.340	0.020
1	1.0000	1.440	1.427	1.615	0.578	0.516	0.405	0.022
1¹/₈	1.1250	1.627	1.614	1.826	0.672	0.610	0.500	0.025
1¼	1.2500	1.815	1.801	2.038	0.765	0.703	0.523	0.028
1⅜	1.3750	2.008	1.973	2.249	0.821	0.759	0.493	0.031
1½	1.5000	2.197	2.159	2.416	0.828	0.766	0.565	0.034