Nominal Diameter	Thread Diameter (mm)	Pitch (mm)	Thread Diameter (inches)	Pitch (inches)	Tapping drill diameter
G 1/8 x 28H	9,728	0,907	1/8	28	8,80
G 1/4 x 19H	13,157	1,336	1/4	19	11,80
G 3/8 x 19H	16,662	1,336	3/8	19	15,25
G 1/2 x 14H	20,995	1,814	1/2	14	19,00
G 5/8 x 14H	22,911	1,814	5/8	14	21,00
G 3/4 x 14H	26,441	1,814	3/4	14	24,50
G 7/8 x 14H	30,201	1,814	7/8	14
G 1" x 11H	33,249	2,309	1"	11	30,75
G 1"1/8 x 11H	37,897	2,309	1"1/8	11
G 1"1/4 x 11H	41,91	2,309	1"1/4	11	39,5
G 1"3/8 x 11H	44,323	2,309	1"3/8	11
G 1"1/2 x 11H	47,803	2,309	1"1/2	11	45,00
G 1"3/4 x 11H	53,746	2,309	1"3/4	11
G 2" x 11H	59,614	2,309	2"	11	57,00
G 2"1/4 x 11H	65,71	2,309	2"1/4	11
G 2"1/2 x 11H	75,184	2,309	2"1/2	11
G 2"3/4 x 11H	81,538	2,309	2"3/4	11
G 3" x 11H	87,884	2,309	3"	11
G 3"1/4 x 11H	93,98	2,309	3"1/4	11
G 3"1/2 x 11H	100,33	2,309	3"1/2	11
G 3"3/4 x 11H	106,68	2,309	3"3/4	11
G 4" x 11H	113,03	2,309	4"	11