, or

ISO	BA	BSF	Whitworth	Tapping	Clearance
-	12	-	-	1.05	1.40
-	11	-	-	1.20	1.60
-	10	-	-	1.40	1.80
-	9	-	-	1.55	1.95
-	8	-	-	1.8	2.25
-	7	-	-	2.05	2.55
-	6	-	-	2.30	2.85
M3	-	-	-	2.50	3.10
ISO	BA	BSF	Whitworth	Tapping	Clearance
-	-	-	1/8"	2.55	3.3
-	5	-	-	2.65	3.3
-	4	-	-	3.0	3.7
M4	-	-	-	3.3	4.1
-	3	-	-	3.45	4.2
-	-	-	3/16"	3.7	5.0
-	-	3/16"	-	3.95	4.9
-	2	-	-	4.0	4.8
ISO	BA	BSF	Whitworth	Tapping	Clearance
M5	-	-	-	4.2	5.1
-	1	-	-	4.5	5.4
-	-	7/32"	-	4.65	5.6
M6	-	-	-	5.0	6.1
-	0	-	-	5.1	6.1
-	-	-	1/4"	5.1	6.5
-	-	1/4"	-	5.3	6.5
M7	-	-	-	6.0	7.2
ISO	BA	BSF	Whitworth	Tapping	Clearance
-	-	-	5/16"	6.5	8.0
-	-	5/16"	-	6.75	8.0
M8	-	-	-	6.8	8.2
-	-	-	3/8"	7.9	9.8
-	-	3/8"	-	8.25	9.8
M10	-	-	-	8.5	10.2
-	-	-	7/16"	9.25	11.5
-	-	7/16	-	9.7	11.55
ISO	BA	BSF	Whitworth	Tapping	Clearance
M12	-	-	-	10.2	12.2
-	-	-	1/2"	10.5	13.1
-	-	1/2"	-	11.15	13.05
-	-	-	9/16"	12.1	14.7
-	-	9/16"	-	12.7	14.68