COMPARISON OF US, METRIC AND WHITWORTH WRENCHES
US	METRIC	WHITWORTH	DECIMAL	OPEN END WRENCH		BOX END OR
			INCHES			SOCKET WRENCH
NOMINAL NUT SIZE				MIN	MAX	MIN	MAX
5/32			0.156	0.158	0.161	0.158	0.163
	4mm		0.157	0.159	0.162	0.159	0.164
		7BA	0.172	0.774	0.177	0.174	0.179
3/16			0.187	0.190	0.193	0.190	0.195
		6BA	0.193	0.795	0.198	0.195	0.200
	5mm		0.197	0.199	0.020	0.199	0.200
13/64			0.203	0.205	0.208	0.205	0.210
7/32			0.218	0.221	0.224	0.221	0.226
		5BA	0.220	0.222	0.225	0.222	0.227
15/63			0.234	0.236	0.239	0.236	0.241
	6mm		0.236	0.238	0.241	0.238	0.243
		4BA	0.248	0.250	0.025	0.250	0.255
1/4			0.250	0.252	0.255	0.252	0.757
17/64			0.265	0.268	0.271	0.268	0.273
	7mm		0.276	0.278	0.281	0.278	0.283
9/32			0.281	0.284	0.288	0.284	0.290
		3BA	0.282	0.284	0.288	0.284	0.289
5/16			0.312	0.316	0.320	0.316	0.322
	8mm		0.315	0.317	0.321	0.317	0.322
		2BA	0.324	0.327	0.331	0.327	0.333
		1/8W	0.338	0.341	0.345	0.341	0.347
11 /32			0.343	0.347	0.351	0.347	0.353
	9mm		0.354	0.357	0.361	0.357	0.363
		1BA	0.365	0.363	0.372	0.368	0.374
3/8			0.375	0.378	0.382	0.378	0.381
	10mm		0.393	0.396	0.400	0.396	0.402
		0BA	0.413	0.416	0.420	0.416	0.422
	11mm		0.433	0.436	0.440	0.436	0.442
7/16			0.437	0.440	0.444	0.440	0.446
		3/16W	0.448	0.451	0.455	0.451	0.457
15/32			0.468	0.472	0.476	0.472	0.478
	12mm		0.472	0.475	0.479	0.475	0.481
1/2			0.500	0.504	0.508	0.504	0.510
	13mm		0.512	0.516	0.520	0.516	0.522
		1/4W	0.525	0.529	0.533	0.529	0.535
17/32			0.531	0.535	0.539	0.535	0.541
	14mm		0.551	0.555	0.559	0.555	0.561
9/16			0.562	0.566	0.570	0.566	0.573
	15mm		0.591	0.595	0.549	0.595	0.601
19/32			0.593	0.598	0.602	0.598	0.604
		5/16W	0.600	0.604	0.608	0.604	0.612
5/8			0.625	0.629	0.633	0.629	0.636
	16mm		0.630	0.634	0.638	0.634	0.642
21/32			0.656	0.661	0.665	0.661	0.668
	17mm		0.669	0.673	0.677	0.673	0.681
11/16			0.687	0.692	0.696	0.692	0.699
	18mm		0.709	0.715	0.720	0.715	0.723
		3/8W	0.710	0.715	0.720	0.715	0.723
	19mm		0.748	0.753	0.758	0.753	0.761
3/4			0.750	0.755	0.760	0.755	0.753
25/32			0.781	0.786	0.79I	0.786	0.794
	20mm		0.787	0.792	0.797	0.792	0.800
13/16			0.812	0.818	0.823	0.818	0.826
		7/16W	0.820	0.825	0.830	0.825	0.833
	21mm		0.827	0.832	0.837	0.832	0.840
	22mm		0.866	0.871	0.876	0.871	0.879
7/8			0.875	0.880	0.885	0.880	0.888
	23mm		0.906	0.911	0.916	0.911	0.920
29/32			0.906	0.911	0.916	0.911	0.920
		1/2W	0.920	0.925	0.930	0.925	0.934
15/ 16			0.937	0.944	0.949	0.944	0.953
	24mm		0.945	0.950	0.955	0.950	0.959
31/32			0.968	0.975	0.981	0.975	0.984
	25mm		0.984	0.990	0.996	0.990	0.999
1			1.000	1.006	1.012	1.006	1.015
		9/16W	1.010	1.016	1.022	1.016	1.025
	26mm		1.024	1.030	1.036	1.030	1.039
1 1/16			1.062	1.068	1.074	1.068	1.077
	27mm		1.063	1.069	1.075	1.069	1.078
		5/8W	1.100	1.107	1.113	1.107	1.117
	28mm		1.102	1.109	1.115	1.109	1.119
1 1/8			1.125	1.132	1.139	1.132	1.142
	29mm		1.142	1.149	1.156	1.149	1.159
	30mm		1.181	1.188	1.195	1.188	1.198
1 3/ 16			1.187	1.195	1.202	1.195	1.205
		11/16W	1.200	1.207	1.214	1.207	1.217
	31mm		1.220	1.727	1.234	1.227	1.237
1 1/4			1.250	1.258	1.266	1.258	1.269
	32mm		1.260	1.267	1.275	1.267	1.277
	33mm		1.299	1.306	1.314	1.306	1.316