ASME B18.2.1 Dimensions, Specifications, Equivalent Standards, Weights, PDF

ASME B18.2.1 Dimensions – Table Of Content

ASME B18.2.2 Square and Hex Machine Screw Nut
ASME B18.2.2 Small Pattern Hex Machine Screw Nuts
ASME B18.2.2 Square Nuts
ASME B18.2.2 Hex Flat Nuts and Hex Flat Jam Nuts
ASME B18.2.2 Hex Nuts and Hex Jam Nuts
ASME B18.2.2 Hex Slotted Nuts
ASME B18.2.2 Hex Thick Nuts
ASME B18.2.2 Hex Thick Slotted Nuts
ASME B18.2.2 Heavy Square Nuts
ASME B18.2.2 Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts
ASME B18.2.2 Heavy Hex Nuts and Heavy Hex Jam Nuts
ASME B18.2.2 Heavy Hex Slotted Nuts
ASME B18.2.2 Hex Flange Nuts and Large Hex Flange Nuts
ASME B18.2.2 Hex Coupling Nuts

ASME B18.2.2 Square and Hex Machine Screw Nut
ASME B18.2.2 Square and Hex Machine Screw Nut
Table 1-1 Dimensions of Square and Hex Machina Screw Nuts
Mchine Screw Nuts [Nuts (1)]
Nominal Size Basic Major Dianmeter of Thread Width Across Flats ,F Width Across Corners Hex,G1 Min. Max. Thickness Bearing Surface Runout to Thread Axis,FLM
Basic Min. Max. Square G Hex, G1 Min. Max.
Min. Max. Min. Max.
0 0.060 5/32 0.150 0.156 0.206 0.221 0.171 0.180 0.043 0.050 0.005
1 0.073 5/32 0.150 0.156 0.206 0.221 0.171 0.180 0.043 0.050 0.005
2 0.086 3/16 0.180 0.188 0.247 0.265 0.205 0.217 0.057 0.066 0.006
3 0.099 3/16 0.180 0.188 0.247 0.265 0.205 0.217 0.057 0.066 0.006
4 0.112 1/4 0.241 0.250 0.331 0.354 0.275 0.289 0.087 0.098 0.009
5 0.125 5/16 0.302 0.312 0.415 0.442 0.344 0.361 0.102 0.114 0.011
6 0.138 5/16 0.302 0.312 0.415 0.442 0.344 0.361 0.102 0.114 0.011
8 0.164 11/32 0.332 0.344 0.456 0.486 0.378 0.397 0.117 0.130 0.012
10 0.190 3/8 0.362 0.375 0.497 0.530 0.413 0.433 0.117 0.130 0.013
12 0.216 7/16 0.423 0.438 0.581 0.619 0.482 0.505 0.148 0.161 0.015
1/4 0.250 7/16 0.423 0.438 0.581 0.619 0.482 0.505 0.178 0.193 0.015
1/3 0.312 9/16 0.545 0.562 0.748 0.795 0.621 0.650 0.208 0.225 0.020
3/8 0.375 5/8 0.607 0.625 0.833 0.884 0.692 0.722 0.239 0.257 0.021

ASME B18.2.2 Small Pattern Hex Machine Screw Nuts

ASME B18.2.1 Dimensions, Specifications, Equivalent Standards, Weights, PDF

ASME B18.2.2 Small Pattern Hex Machine Screw Nuts

Dimensions of Small Pattern Her Machine Screw Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners		Thickness		Bearing Surface Runout to Thread Axis, FLM
		Basic	Min.	Max	hex,G1		Min.	Max
		Basic	Min.	Max	Min.	Max	Min.	Max
0	0.060	1/8	0.121	0.125	0.134	0.140	0.043	0.050	0.005
1	0.073	1/8	0.121	0.125	0.134	0.140	0.043	0.050	0.005
2	0.086	5/32	0.150	0.156	0.171	0.180	0.057	0.066	0.006
3	0.099	5/32	0.150	0.156	0.171	0.180	0.057	0.066	0.006
4	0.112	3/16	0.180	0.188	0.205	0.217	0.087	0.098	0.009
5	0.125	1/4	0.241	0.250	0.275	0.289	0.102	0.114	0.011
6	0.138	5/16	0.302	0.312	0.344	0.361	0.102	0.114	0.011
8	0.164	11/32	0.332	0.344	0.378	0.397	0.117	0.130	0.012
10	0.190	3/8	0.362	0.375	0.413	0.433	0.117	0.130	0.013

ASME B18.2.2 Square Nuts

Dimensions of Square Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness Basic Min. Max.			Bearing Surface Runout to Thread Axis, FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Bearing Surface Runout to Thread Axis, FLM
1/4	0.2500	7/16	0.425	0.438	0.554	0.619	7/32	0.203	0.235	0.110
5/16	0.3125	9/16	0.547	0.562	0.721	0.795	17/64	0.249	0.283	0.015
3/8	0.3750	5/8	0.606	0.625	0.802	0.884	21/64	0.310	0.346	0.016
7/16	0.4375	3/4	0.728	0.750	0.970	1.061	3/8	0.356	0.394	0.019
1/2	0.5000	13/16	0.788	0.812	1.052	1.149	7/16	0.418	0.458	0.022
5/8	0.6250	1	0.969	1.000	1.300	1.414	35/64	0.525	0.569	0.026
3/4	0.7500	1 1/8	1.088	1.125	1.464	1.591	21/32	0.632	0.680	0.029
7/8	0.8750	1 5/16	1.269	1.312	1.712	1.856	49/64	0.740	0.792	0.034
1	1.0000	1 1/2	1.450	1.500	1.961	2.121	7/8	0.847	0.903	0.039
1 1/8	1.1250	1 11/16	1.631	1.688	2.209	2.386	1	0.970	1.030	0.029
1 1/4	1.2500	1 7/8	1.812	1.875	2.458	2.652	1 3/32	1.062	1.126	0.032
1 3/8	1.3750	2 1/16	1.994	2.062	2.708	2.917	1 13/64	1.169	1.237	0.035
1 1/2	1.5000	2 1/4	2.175	2.250	2.956	3.182	1 5/16	1.276	1.348	0.039

ASME B18.2.2 Hex Flat Nuts and Hex Flat Jam Nuts

Dimensions of Hex Flat Nuts and Hex Flat Jam Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness Hex Flat Nuts,H			Thickness Hex Flat Jam Nuts,H1			Bearing Surface Runout to Thread Axis, FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Basic	Min.	Max	Bearing Surface Runout to Thread Axis, FLM
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	1	0.970	1.030	5/8	0.595	0.655	0.029
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 3/32	1.062	1.126	3/4	0.718	0.782	0.032
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 13/64	1.169	1.237	4/5	0.778	0.846	0.035
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 5/16	1.276	1.348	7/8	0.839	0.911	0.039

ASME B18.2.2 Hex Nuts and Hex Jam Nuts

Dimensions of Hex Flat Nuts and Hex Flat Jam Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness Hex Flat Nuts,H			Thickness Hex Flat Jam Nuts,H1			Bearing Surface Runout to Thread Axis, FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Basic	Min.	Max	Bearing Surface Runout to Thread Axis, FLM
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	1	0.970	1.030	5/8	0.595	0.655	0.029
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 3/32	1.062	1.126	3/4	0.718	0.782	0.032
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 13/64	1.169	1.237	4/5	0.778	0.846	0.035
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 5/16	1.276	1.348	7/8	0.839	0.911	0.039

ASME B18.2.2 Hex Slotted Nuts

Dimensions of Hex Slotted Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness ,H			Unslotted Thickness,T		Width of Slot,S		Maximum Runout of Bearing Surface to Thread Axis,FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max.	Basic	Min.	Max	Min.	Max	Min.	Max	Maximum Runout of Bearing Surface to Thread Axis,FLM
1/4	0.2500	7/16	0.428	0.438	0.488	0.505	7/32	0.212	0.226	0.12	0.140	0.07	0.10	0.015
5/16	0.3125	1/2	0.489	0.500	0.557	0.577	17/64	0.258	0.273	0.16	0.180	0.09	0.12	0.016
3/8	0.3750	9/16	0.551	0.562	0.628	0.650	21/64	0.320	0.337	0.19	0.210	0.12	0.15	0.018
7/16	0.4375	11/16	0.675	0.688	0.768	0.794	3/8	0.365	0.385	0.21	0.230	0.12	0.15	0.018
1/2	0.5000	3/4	0.736	0.750	0,.84	0.866	7/16	0.427	0.448	0.27	0.290	0.15	0.18	0.019
9/16	0.5625	7/8	0.861	0.875	0.982	1.010	31/64	0.473	0.496	0.29	0.310	0.15	0.18	0.020
5/8	0.6250	15/16	0.922	0.938	1.051	1.083	35/64	0.535	0.559	0.32	0.340	0.18	0.24	0.021
3/4	0.7500	1 1/8	1.088	1.125	1.240	1.299	41/64	0.617	0.665	0.38	0.400	0.18	0.24	0.023
7/8	0.8750	1 5/16	1.269	1.312	1.447	1.516	3/4	0.724	0.776	0.49	0.520	0.18	0.24	0.025
1	1.0000	1 1/2	1.450	1.500	1.653	1.732	55/64	0.831	0.887	0.56	0.590	0.24	0.30	0.027
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	31/32	0.939	0.999	0.61	0.640	0.24	0.33	0.030
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 1/16	1.030	1.094	0.67	0.700	0.31	0.40	0.033
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 11/64	1.138	1.206	0.78	0.820	0.31	0.40	0.036
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 9/32	1.245	1.317	0.82	0.860	0.37	0.46	0.039

ASME B18.2.2 Hex Thick Nuts

Dimensions of Hex Thick Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G Min. Max.		Thickness, H Basic Min. Max.			Maximum Runout of Bearing Surface to Thread Axis, FLM
		Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.	Specified Proof load
		Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.	Up to 150,000psi	150,000psi and Greater
1/4	0.2500	7/16	0.428	0.438	0.488	0.505	9/32	0.274	0.288	0.015	0.010
5/16	0.3125	1/2	0.489	0.500	0.557	0.577	21/64	0.320	0.336	0.016	0.011
3/8	0.3750	9/16	0.551	0.562	0.628	0.650	13/32	0.398	0.415	0.017	0.012
7/16	0.4375	11/16	0.675	0.688	0.768	0.794	29/64	0.444	0.463	0.018	0.013
1/2	0.5000	3/4	0.736	0.750	0.840	0.866	9/16	0.552	0.573	0.019	0.014
9/16	0.5625	7/8	0.861	0.875	0.892	1.010	29/64	0.598	0.621	0.020	0.015
5/8	0.6250	15/16	0.922	0.938	1.051	1.083	23/32	0.706	0.731	0.021	0.016
3/4	0.7500	1 1/8	1.088	1.125	1.240	1.299	13/16	0.798	0.827	0.023	0.018
7/8	0.8750	1 5/16	1.269	1.312	1.447	1.516	29/32	0.890	0.922	0.025	0.020
1	1.0000	1 1/2	1.450	1.500	1.653	1.732	1	0.982	1.018	0.027	0.022
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	1 5/32	1.136	1.176	0.030	0.025
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 1/4	1.228	1.272	0.033	0.028
1 3/8	1.3750	1 1/16	1.994	2.062	2.273	2.382	1 3/8	1.351	1.399	0.036	0.031
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 1/2	1.474	1.526	0.039	0.034

ASME B18.2.2 Hex Thick Slotted Nuts

Dimensions of Hex Thick Slotted Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F Basic			Width Across Corners, G[Note(2)] Min. Max.		Thickness ,H Basic Min. Max.			Unslotted Thickness,T [Note(3)] Min. Max.		Width of Slot,S[Note(3)] Min. Max.		Maximum Runout of Bearing Surface to Thread Axis,FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Min.	Max	Min.	Max	Maximum Runout of Bearing Surface to Thread Axis,FLM
1/4	0.2500	7/16	0.428	0.438	0.488	0.505	9/32	0.274	0.288	0.18	0.200	0.07	0.10	0.015
5/16	0.3125	1/2	0.489	0.500	0.577	0.577	21/64	0.320	0.336	0.22	0.240	0.09	0.12	0.016
3/8	0.3745	9/16	0.551	0.562	0.628	0.650	13/32	0.398	0.415	0.27	0.290	0.12	0.15	0.017
7/16	0.4375	11/16	0.675	0.688	0.768	0.794	29/64	0.444	0.463	0.29	0.310	0.12	0.15	0.018
1/2	0.5000	3/4	0.736	0.750	0.840	0.866	9/16	0.552	0.573	0.40	0.420	0.15	0.18	0.019
9/16	0.5625	7/8	0.861	0.875	0.982	1.010	39/64	0.598	0.621	0.41	0.430	0.15	0.18	0.020
5/8	0.6250	15/16	0.922	0.938	1.051	1.083	23/32	0.706	0.731	0.49	0.510	0.18	0.24	0.021
3/4	0.7500	1 1/2	1.088	1.125	1.240	1.299	13/16	0.798	0.827	0.55	0.570	0.18	0.24	0.023
7/8	0.8750	1 11/16	1.269	1.312	1.447	1.516	29/32	0.890	0.922	0.64	0.670	0.18	0.24	0.025
1	1.0000	1 1/2	1.450	1.500	1.653	1.732	1	0.982	1.018	0.70	0.730	0.24	0.30	0.027
1 1/8	1.1250	1 11/16	1.631	1.688	1.859	1.949	1 5/32	1.136	1.176	0.80	0.830	0.24	0.33	0.030
1 1/4	1.2500	1 7/8	1.812	1.875	2.066	2.165	1 1/4	1.228	1.272	0.86	0.890	0.31	0.40	0.033
1 3/8	1.3750	2 1/16	1.994	2.062	2.273	2.382	1 3/8	1.351	1.399	0.98	1.020	0.31	0.40	0.036
1 1/2	1.5000	2 1/4	2.175	2.250	2.480	2.598	1 1/2	1.474	1.526	1.04	1.080	0.37	0.46	0.039

ASME B18.2.2 Heavy Square Nuts

Dimensions of Heavy Square Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness			Bearing Surface Runout to Thread Axis, FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Bearing Surface Runout to Thread Axis, FLM
1/4	0.2500	1/2	0.488	0.500	0.640	0.707	1/4	0.218	0.266	0.026
5/16	0.3125	9/16	0.546	0.562	0.720	0.795	5/16	0.280	0.330	0.030
3/8	0.3750	11/16	0.699	0.688	0.889	0.973	3/8	0.341	0.393	0.038
7/16	0.4375	3/4	0.728	0.75	0.970	1.060	7/16	0.403	0.456	0.039
1/2	0.5000	7/8	0.850	0.875	1.137	1.237	1/2	0.464	0.520	0.046
5/8	0.6250	1 1/16	1.031	1.062	1.386	1.503	5/8	0.587	0.647	0.056
3/4	0.7500	1 1/4	1.212	1.25	1.635	1.768	3/4	0.710	0.774	0.065
7/8	0.8750	1 7/16	1.394	1.438	1.884	2.033	7/8	0.833	0.901	0.075
1	1.0000	1 5/8	1.575	1.625	2.132	2.298	1	0.956	1.028	0.082
1 1/8	1.1250	1 13/16	1.756	1.812	2.381	2.563	1 1/8	1.079	1.155	0.063
1 1/4	1.2500	2	1.938	2.000	2.631	2.828	1 1/4	1.187	1.282	0.070
1 3/8	1.3750	2 3/16	2.119	2.188	2.879	3.094	1 3/8	1.310	1.409	0.076
1 1/2	1.5000	2 3/8	2.300	2.375	3.128	3.359	1 1/2	1.433	1.536	0.082

ASME B18.2.2 Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts

Dimensions of Heavy Hex Flat Nuts and Heavy Hex Flat Jam Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness Heavy Hex Flat Nuts,H			Thickness Hex Flat Jam Nuts,H1			Bearing Surface Runout to Thread Axis, FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Basic	Min.	Max	Bearing Surface Runout to Thread Axis, FLM
1 1/8	1.1250	1 13/16	1.756	1.812	2.002	2.093	1 1/8	1.079	1.155	5/8	0.579	0.655	0.032
1 1/4	1.2500	2	1.938	2.000	2.209	2.309	1 1/4	1.187	1.282	3/4	0.687	0.782	0.034
1 3/8	1.3750	2 3/16	2.119	2.188	2.416	2.526	1 3/8	1.310	1.409	13/16	0.747	0.846	0.038
1 1/2	1.5000	2 3/8	2.300	2.375	2.622	2.742	1 1/2	1.433	1.536	7/8	0.808	0.911	0.041
1 3/4	1.7500	2 3/4	2.662	2.750	3.035	3.175	1 3/4	1.679	1.790	1	0.929	1.040	0.048
2	2.0000	3 1/8	3.025	3.125	3.449	3.608	2	1.925	2.044	1 1/8	1.050	1.169	0.054
2 1/4	2.2500	3 1/2	3.388	3.500	3.862	4.041	2 1/4	2.155	2.298	1 1/4	1.155	1.298	0.061
2 1/2	2.5000	3 7/8	3.750	3.875	4.275	4.474	2 1/2	2.401	2.552	1 1/2	1.401	1.552	0.067
2 3/4	2.7500	4 1/4	4.112	4.250	4.688	4.907	2 3/4	2.647	2.806	1 5/8	1.522	1.681	0.074
3	3.0000	4 5/8	4.475	4.625	5.102	5.340	3	2.893	3.060	1 3/4	1.643	1.810	0.080
3 1/4	3.2500	5	4.838	5.000	5.515	5.774	3 1/4	3.124	3.314	1 7/8	1.748	1.939	0.087
3 1/2	3.5000	5 3/8	5.200	5.375	5.928	6.207	3 1/2	3.370	3.568	2	1.870	2.068	0.093
3 3/4	3.7500	5 3/4	5.562	5.750	6.341	6.640	3 3/4	3.616	3.822	2 1/8	1.990	2.197	0.100
4	4.0000	6 1/8	5.925	6.125	6.755	7.073	4	3.862	4.076	2 1/4	2.112	2.326	1.060

ASME B18.2.2 Heavy Hex Nuts and Heavy Hex Jam Nuts

Dimensions of Heavy Hex Nuts and Heavy Hex Jam Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F [Note(1)] Basic Min. Max			Width Across Corners, G [Note(2)] Min. Max.		Thickness Heavy Hex Nuts,H Basic Min. Max.			Thickness Heavy Hex Jam Nuts,H1 Basic Min. Max.			Maximum Runout of Bearing Surface to Thread Axis, FLM
		Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Basic	Min.	Max	Heavy HEX NUTS		Heavy Hex Jam Nuts
													Specified Proof load		Heavy Hex Jam Nuts
													Up to 150,000psi	150,000psi and Greater	All Strength Levels
1/4	0.2500	1/2	0.488	0.500	0.556	0.577	15/64	0.218	0.250	11/64	0.156	0.188	0.017	0.011	0.017
5/16	0.3125	9/16	0.546	0.562	0.622	0.650	19/64	0.280	0.314	13/64	0.186	0.220	0.020	0.012	0.020
3/8	0.3750	11/16	0.669	0.688	0.763	0.794	23/64	0.341	0.377	15/64	0.216	0.252	0.021	0.014	0.021
7/16	0.4375	3/4	0.728	0.750	0.830	0.866	27/64	0.403	0.441	17/64	0.247	0.285	0.022	0.015	0.022
1/2	0.5000	7/8	0.850	0.875	0.969	1.010	31/64	0.464	0.504	19/64	0.277	0.317	0.023	0.016	0.023
9/16	0.5625	15/16	0.909	0.938	1.037	1.083	35/64	0.526	0.568	21/64	0.307	0.349	0.024	0.017	0.024
5/8	0.6250	1 1/16	1.031	1.062	1.175	1.227	39/64	0.587	0.631	23/64	0.337	0.381	0.025	0.018	0.025
3/4	0.7500	1 1/4	1.212	1.250	1.382	1.443	47/64	0.710	0.758	27/64	0.398	0.446	0.027	0.020	0.027
7/8	0.8750	1 7/16	1.394	1.438	1.589	1.660	55/64	0.833	0.885	31/64	0.458	0.510	0.029	0.022	0.029
1	1.0000	1 5/8	1.575	1.625	1.796	1.876	63/64	0.956	1.012	35/64	0.519	0.575	0.031	0.024	0.031
1 1/8	1.1250	1 13/16	1.756	1.812	2.002	2.093	1 7/64	1.079	1.139	39/64	0.579	0.639	0.033	0.027	0.033
1 1/4	1.2500	2	1.938	2.000	2.209	2.309	1 7/32	1.187	1.251	23/32	0.687	0.751	0.035	0.030	0.035
1 3/8	1.3750	2 3/16	2.119	2.188	2.416	2.526	1 11/32	1.310	1.378	25/32	0.747	0.815	0.038	0.033	0.038
1 1/2	1.5000	2 3/8	2.300	2.375	2.622	2.742	1 15/32	1.433	1.505	27/32	0.808	0.880	0.041	0.036	0.041
1 5/8	1.6250	2 9/16	2.481	2.562	2.828	2.959	1 19/32	1.556	1.632	29/32	0.868	0.944	0.044	0.038	0.044
1 3/4	1.7500	2 3/4	2.662	2.750	3.035	3.175	1 23/32	1.679	1.759	31/32	0.929	1.009	0.048	0.041	0.048
1 7/8	1.8750	2 15/16	2.844	2.938	3.242	3.392	1 27/32	1.802	1.886	1 1/32	0.989	1.073	0.051	0.044	0.051
2	2.0000	3 1/8	3.025	3.125	3.449	3.608	1 31/32	1.925	2.013	1 3/32	1.050	1.138	0.055	0.047	0.055
2 1/4	2.2500	3 1/2	3.388	3.500	3.862	4.041	2 13/64	2.155	2.251	1 13/64	1.155	1.251	0.061	0.052	0.061
2 1/2	2.5000	3 7/8	3.750	3.875	4.275	4.474	2 29/64	2.401	2.505	1 29/64	1.401	1.505	0.068	0.058	0.068
2 3/4	2.7500	4 1/4	4.112	4.250	4.688	4.907	2 45/64	2.647	2.759	1 37/64	1.522	1.634	0.074	0.064	0.074
3	3.0000	4 5/8	4.475	4.625	5.102	5.340	2 61/64	2.893	3.013	1 45/64	1.643	1.763	0.081	0.070	0.081
3 1/4	3.2500	5	4.838	5.000	5.515	5.774	3 3/16	3.124	3.252	1 13/16	1.748	1.876	0.087	0.075	0.087
3 1/2	3.5000	5 3/8	5.200	5.375	5.928	6.207	3 7/16	3.370	3.506	1 15/16	1.870	2.006	0.094	0.081	0.094
3 3/4	3.7500	5 3/4	5.562	5.750	6.341	6.640	3 11/16	3.616	3.760	2 1/16	1.990	2.134	0.100	0.087	0.100
4	4.0000	6 1/8	5.925	6.125	6.755	7.073	3 15/16	3.862	4.014	2 3/16	2.112	2.264	0.107	0.093	0.107

ASME B18.2.2 Heavy Hex Slotted Nuts

Dimensions of Heavy Hex Slotted Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F			Width Across Corners, G		Thickness ,H			Unslotted Thickness,T Min. Max.		Width of Slot,S		Maximum Runout of Bearing Surface to Thread Axis,FLM
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max	Min.	Max	Basic	Min.	Max	Min.	Max	Min.	Max	Maximum Runout of Bearing Surface to Thread Axis,FLM
1/4	0.2500	1/2	0.488	0.500	0.556	0.577	15/64	0.218	0.250	0.13	0.15	0.07	0.10	0.017
5/16	0.3125	9/16	0.546	0.562	0.622	0.650	19/64	0.280	0.314	0.19	0.21	0.09	0.12	0.020
3/8	0.3750	11/16	0.669	0.688	0.763	0.794	23/64	0.341	0.377	0.22	0.24	0.12	0.15	0.021
7/16	0.4375	3/4	0.728	0.750	0.830	0.866	27/64	0.403	0.441	0.26	0.28	0.12	0.15	0.022
1/2	0.5000	7/8	0.850	0.875	0.969	1.010	31/64	0.464	0.504	0.32	0.34	0.15	0.18	0.023
9/16	0.5625	15/16	0.909	0.938	1.037	1.083	35/64	0.526	0.568	0.35	0.37	0.15	0.18	0.024
5/8	0.6250	1 1/16	1.031	1.062	1.175	1.227	39/64	0.587	0.631	0.38	0.40	0.18	0.24	0.025
3/4	0.7500	1 1/4	1.212	1.250	1.382	1.443	47/64	0.710	0.758	0.47	0.49	0.18	0.24	0.027
7/8	0.8750	1 7/16	1.394	1.438	1.589	1.660	55/64	0.833	0.885	0.59	0.62	0.18	0.24	0.029
1	1.0000	1 5/8	1.575	1.625	1.796	1.876	63/64	0.956	1.012	0.69	0.72	0.24	0.30	0.031
1 1/8	1.1250	1 13/16	1.756	1.812	2.002	2.093	1 7/64	1.079	1.139	0.75	0.78	0.24	0.33	0.033
1 1/4	1.2500	2	1.938	2.000	2.209	2.309	1 7/32	1.187	1.251	0.83	0.86	0.31	0.40	0.035
1 3/8	1.3750	2 3/16	2.119	2.188	2.416	2.526	1 11/32	1.310	1.378	0.95	0.99	0.31	0.40	0.038
1 1/2	1.5000	2 3/8	2.300	2.375	2.622	2.742	1 15/32	1.433	1.505	1.01	1.05	0.37	0.46	0.041
1 3/4	1.7500	2 3/4	2.662	2.750	3.035	3.175	1 23/32	1.679	1.759	1.20	1.24	0.43	0.52	0.048
2	2.0000	3 1/8	3.025	3.125	3.449	3.608	1 31/32	1.925	2.013	1.38	1.43	0.43	0.52	0.055
2 1/4	2.2500	3 1/2	3.388	3.500	3.862	4.041	2 13/64	2.155	2.251	1.62	1.67	0.43	0.52	0.061
2 1/2	2.5000	3 7/8	3.750	3.875	4.275	4.474	2 29/64	2.401	2.505	1.74	1.79	0.55	0.64	0.068
2 3/4	2.7500	4 1/4	4.112	4.250	4.688	4.907	2 45/64	2.647	2.759	1.99	2.05	0.55	0.64	0.074
3	3.0000	4 5/8	4.475	4.625	5.102	5.340	2 61/64	2.893	3.013	2.17	2.23	0.62	0.71	0.081
3 1/4	3.2500	5	4.838	5.000	5.515	5.774	3 3/16	3.124	3.252	2.41	2.47	0.62	0.71	0.087
3 1/2	3.5000	5 3/8	5.200	5.375	5.928	6.207	3 7/16	3.370	3.506	2.65	2.72	0.62	0.71	0.094
3 3/4	3.7500	5 3/4	5.562	5.750	6.341	6.640	3 11/16	3.616	3.760	2.90	2.97	0.62	0.71	0.100
4	4.0000	6 1/8	5.925	6.125	6.755	7.073	3 15/16	3.862	4.014	3.15	3.22	0.62	0.71	0.107

ASME B18.2.2 Hex Flange Nuts and Large Hex Flange Nuts

Dimensions of Hex Flange Nuts and Large Hex Flange Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F		Width Across Corners, G		Diameter Flange,B		Nut Thickness,H		Maximum Wrenching Length,J	Maximum Flange Thickness ,K	Maximum Runout of Bearing Surface to Thread Axis,FLM
Nominial Size	Basic Major Diameter of Thread	M in	Max	Min	Max	M in	Max	Min	Max	Maximum Wrenching Length,J	Maximum Flange Thickness ,K	Maximum Runout of Bearing Surface to Thread Axis,FLM
Hex Flange Nuts
No.6	0.1380	0.302	0.312	0.342	0.361	0.406	0.422	0.156	0.171	0.10	0.02	0.014
8	0.1640	0.334	0.344	0.381	0.397	0.452	0.469	0.187	0.203	0.13	0.02	0.016
10	0.1900	0.365	0.375	0.416	0.433	0.480	0.5	0.203	0.219	0.13	0.03	0.017
12	0.2160	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.020
1/4	0.2500	0.428	0.438	0.488	0.505	0.574	0.594	0.222	0.236	0.14	0.04	0.020
5/16	0.3125	0.489	0.500	0.557	0.577	0.660	0.68	0.268	0.283	0.17	0.04	0.023
3/8	0.3750	0.551	0.562	0.628	0.650	0.728	0.75	0.330	0.347	0.23	0.04	0.025
7/16	0.4375	0.675	0.688	0.768	0.794	0.910	0.937	0.375	0.395	0.26	0.04	0.032
1/2	0.5000	0.736	0.750	0.840	0.866	1.000	1.031	0.437	0.458	0.31	0.05	0.035
9/16	0.5625	0.861	0.875	0.982	1.010	1.155	1.188	0.483	0.506	0.35	0.05	0.040
5/8	0.6250	0.922	0.938	1.051	1.083	1.248	1.281	0.545	0.569	0.40	0.05	0.044
3/4	0.7500	1.088	1.125	1.240	1.299	1.460	1.5	0.627	0.675	0.46	0.60	0.051
Large Hex Flange Nuts
1/4	0.2500	0.428	0.438	0.488	0.505	0.700	0.728	0.281	0.312	0.15	0.04	0.024
5/16	0.3125	0.489	0.500	0.557	0.577	0.790	0.82	0.343	0.375	0.20	0.04	0.028
3/8	0.3750	0.551	0.562	0.628	0.650	0.885	0.915	0.390	0.406	0.24	0.04	0.031
7/16	0.4375	0.675	0.688	0.768	0.794	1.100	1.131	0.437	0.468	0.26	0.04	0.038
1/2	0.5000	0.736	0.750	0.840	0.866	1.175	1.205	0.485	0.515	0.29	0.06	0.041
9/16	0.5625	0.861	0.875	0.982	1.010	1.260	1.3	0.546	0.578	0.37	0.06	0.044
5/8	0.6250	0.922	0.938	1.051	1.083	1.280	1.36	0.600	0.640	0.42	0.06	0.045

ASME B18.2.2 Hex Coupling Nuts

Dimensions of Hex Coupling Nuts
Nominial Size	Basic Major Diameter of Thread	Widtf Across Flats, F Basic Min. Max			Width Across Corners, G Min. Max.		Length,H Basic Min. Max.
Nominial Size	Basic Major Diameter of Thread	Basic	Min.	Max.	Min.	Max.	Basic	Min.	Max.
#6	0.138	5/16	0.302	0.312	0.344	0.361	1/2	0.470	0.510
#8	0.164	5/16	0.302	0.312	0.344	0.361	5/8	0.595	0.645
#10	0.190	5/16	0.302	0.312	0.344	0.361	3/4	0.711	0.760
1/4	0.250	7/16	0.428	0.438	0.438	0.488	1 3/4	1.690	1.760
5/16	0.312	1/2	0.489	0.500	0.557	0.577	1 3/4	1.690	1.760
3/8	0.375	9/16	0.551	0.562	0.628	0.650	1 3/4	1.690	1.760
7/16	0.437	5/8	0.607	0.625	0.692	0.722	1 3/4	1.690	1.760
1/2	0.500	11/16	0.663	0.688	0.756	0.794	1 3/4	1.690	1.760
9/16	0.562	13/16	0.782	0.813	0.891	0.939	2 1/8	2.067	2.135
5/8	0.625	13/16	0.782	0.813	0.891	0.939	2 1/8	2.067	2.135
3/4	0.750	1	0.963	1.000	1.097	1.155	2 1/4	2.190	2.260
7/8	0.875	1 1/4	1.212	1.250	1.382	1.443	2 1/2	2.440	2.510
1	1.000	1 3/8	1.325	1.375	1.511	1.588	2 3/4	2.690	2.760
1 1/8	1.125	1 1/2	1.450	1.500	1.653	1.732	3	2.940	3.010
1 1/4	0.125	1 5/8	1.575	1.625	1.825	1.876	3	2.940	3.010
1 1/2	1.500	2	1.950	2.000	2.275	2.309	3 1/2	3.440	3.510
1 5/8	1.625	2 9/16	2.481	2.562	2.828	2.959	4 7/8	4.830	4.900
1 3/4	1.750	2 3/4	2.662	2.750	3.035	3.175	5 1/4	5.210	5.290
1 7/8	1.875	2 15/16	2.844	2.938	3.242	3.392	5 5/8	5.580	5.670
2	2.000	3 1/8	3.025	3.125	3.448	3.608	6	5.950	6.040
2 1/4	2.250	3 1/2	3.388	3.500	3.862	4.041	6 3/4	6.700	6.800
2 1/2	2.500	3 7/8	3.750	3.875	4.275	4.474	7 1/2	7.440	7.550
2 3/4	2.750	4 1/4	4.112	4.250	4.688	4.907	8 1/4	8.190	8.310
3	3.000	4 5/8	4.475	4.625	5.101	5.340	9	8.940	9.060
3 1/4	3.250	5	4.838	5.000	5.515	5.773	9 3/4	9.680	9.810
3 1/2	3.500	5 3/8	5.200	5.375	5.928	6.206	10 1/2	10.430	10.570
3 3/4	3.750	5 3/4	5.562	5.750	6.340	6.639	11 1/4	11.170	11.320
4	4.000	6 1/8	5.925	6.125	6.754	7.072	12	11.920	12.080
4 1/4	4.250	6 1/2	6.288	6.500	7.168	7.506	12 3/4	12.670	12.830
4 1/2	4.500	6 7/8	6.650	6.875	7.581	7.939	13 1/2	13.420	13.580
4 3/4	4.750	7 1/4	7.012	7.250	7.994	8.372	14 1/4	14.160	14.340
5	5.000	7 5/8	7.375	7.625	8.408	8.805	15	14.910	15.090
5 1/4	5.250	8	7.738	8.000	8.821	9.238	15 3/4	15.650	15.850
5 1/2	5.500	8 3/8	8.100	8.375	9.234	9.671	16 1/2	16.400	16.600
5 3/4	5.750	8 3/4	8.462	8.750	9.647	10.104	17 1/4	17.150	17.350
6	6.000	9 1/8	8.825	9.125	10.060	10.537	18	17.890	18.110