B.S.W.
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
1/16	60	0.0625	0.0107	58	0.0420	96
				57	0.0430	91
				1.1mm	0.0433	90
				1.15mm	0.0453	81
				56	0.0465	75
				3/64	0.0469	73
				1.2mm	0.0472	72
				1.25mm	0.0492	62
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
3/32	48	0.0937	0.0133	51	0.0670	100
				1.75mm	0.0689	93
				50	0.0700	89
				1.8mm	0.0709	86
				1.85mm	0.0728	79
				49	0.0738	75
				1.9mm	0.0748	71
				48	0.0760	67
				1.95mm	0.0768	64
				5/64	0.0781	59
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
1/8	40	0.1250	0.0160	42	0.0935	98
				3/32	0.0938	98
				2.4mm	0.0945	95
				41	0.0960	91
				40	0.0980	84
				2.5mm	0.0984	83
				39	0.0995	80
				38	0.1015	73
				2.6mm	0.1024	71
				37	0.1040	66
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
5/32	32	0.1562	0.0200	3.0mm	0.1181	95
				31	0.1200	91
				3.1mm	0.1220	86
				1/8	0.1250	78
				3.2mm	0.1260	76
				30	0.1285	69
				3.3mm	0.1299	66
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
3/16	24	0.1875	0.0267	3.4mm	0.1339	100
				29	0.1360	96
				3.5mm	0.1378	93
				28	0.1405	88
				9/64	0.1406	88
				3.6mm	0.1417	86
				27	0.1440	81
				3.7mm	0.1457	78
				26	0.1470	76
				25	0.1495	71
				3.8mm	0.1496	71
				24	0.1520	66
				3.9mm	0.1535	64
				23	0.1540	63
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
7/32	24	0.2187	0.0267	4.2mm	0.1654	100
				19	0.1660	99
				4.3mm	0.1693	93
				18	0.1695	92
				11/64	0.1719	88
				17	0.1730	86
				4.4mm	0.1732	85
				16	0.1770	78
				4.5mm	0.1772	78
				15	0.1800	72
				4.6mm	0.1811	70
				14	0.1820	69
				13, 4.7mm	0.1850	63
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
1/4	20	0.25	0.032	3/16	0.1875	98
				12, 4.8mm	0.1890	95
				11	0.1910	92
				4.9mm	0.1929	89
				10	0.1935	88
				9	0.1960	84
				5.0mm	0.1968	83
				8	0.1990	80
				5.1mm	0.2008	77
				7	0.2010	77
				13/64	0.2031	73
				6	0.2040	72
				5.2mm	0.2047	71
				5	0.2055	70
				5.3mm	0.2087	65
				4	0.2090	64
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
9/32	20	0.2812	0.032	7/32	0.2188	98
				5.6mm	0.2205	95
				2	0.2210	94
				5.7mm	0.2244	89
				1	0.2280	83
				5.8mm	0.2283	83
				5.9mm	0.2323	76
				"A"	0.2340	74
				15/64	0.2344	73
				6.0mm	0.2362	70
				"B"	0.2380	68
				6.1mm	0.2402	64
				"C"	0.2420	61
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
5/16	18	0.3125	0.0356	"C"	0.2420	99
				6.2mm	0.2441	96
				"D"	0.2460	93
				6.3mm	0.2480	91
				"E", 1/4	0.2500	88
				6.4mm	0.2520	85
				6.5mm	0.2559	79
				"F"	0.2570	78
				6.6mm	0.2598	74
				"G"	0.2610	72
				6.7mm	0.2638	68
				17/64	0.2656	66
				"H"	0.2660	65
				6.8mm	0.2677	63
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
3/8	16	0.375	0.04	"M"	0.2950	100
				7.5mm	0.2953	100
				19/64	0.2969	98
				7.6mm	0.2992	95
				"N"	0.3020	91
				7.7mm	0.3031	90
				7.8mm	0.3071	85
				7.9mm	0.3110	80
				5/16	0.3125	78
				8	0.3150	75
				"O"	0.3160	74
				8.1mm	0.3189	70
				8.2mm	0.3228	65
				"P"	0.3230	65
				8.3mm	0.3268	60
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
7/16	14	0.4375	0.0457	8.8mm	0.3465	100
				"S"	0.3480	98
				8.9mm	0.3504	95
				9.0mm	0.3543	91
				"T"	0.3580	87
				9.1mm	0.3583	87
				23/64	0.3594	85
				9.2mm	0.3622	82
				9.3mm	0.3661	78
				"U"	0.3680	76
				9.4mm	0.3701	74
				9.5mm	0.3740	69
				3/8	0.3750	68
				"V"	0.3770	66
				9.6mm	0.3780	65
				9.7mm	0.3819	61
SIZE	t.p.i.	TAP Size Decimal	THREAD DEPTH	TAPPING DRILL	Decimal	% Engagement
1/2	12	0.5	0.0533	10.0mm	0.3937	100
				"X"	0.3970	97
				10.1mm	0.3976	96
				10.2mm	0.4016	92
				"Y"	0.4040	90
				10.3mm	0.4055	89
				13/32	0.4062	88
				10.4mm	0.4094	85
				"Z"	0.4130	82
				10.5mm	0.4134	81
				10.6mm	0.4173	78
				10.7mm	0.4213	74
				27/64	0.4219	73
				10.8mm	0.4252	70
				10.9mm	0.4291	67
				11.0mm	0.4331	63