上海吉都国际贸易有限公司

Bicycle Screw Thread DIN 79012

Different threads emerged from developments in bicycle production, many of them are from the late 19th or early 20th century, partly from the US or Great Britain, which is the reason why inch dimensions are still in use until today.
The flank angle is 60°

Thread Size	Major	Tapping	TPI	Pitch
mm	Diameter	Drill Size		mm
	mm	mm
Fg 2	2.096	1.613	56	0.454
Fg 2.3	2.299	1.816	56	0.454
Fg 2.6	2.604	2.121	56	0.454
Fg 6.35	6.350	5.310	26	0.977
Fg 7.9	7.938	6.898	26	0.977
Fg 9.5	9.525	8.485	26	0.977
Fg 14.3	14.288	12.934	20	1.270
Fg 25.4	25.400	24.272	24	1.058
Fg 32.8	32.766	31.638	24	1.058
Fg 34.8	34.798	33.670	24	1.058