British Standard Cycle Thread

British Standard Cycle is a British Imperial screw thread standard.

Diameter (in)	TPI	Pitch (in)	Outside Diameter (in)	Core Diameter (in)
1/4	26	0.0385	0.250	0.209
5/16	26	0.0385	0.3125	0.272
3/8	26	0.0385	0.3750	0.334
7/16	26	0.0385	0.4375	0.397
1/2	26	0.0385	0.5000	0.459
9/16	26	0.0385	0.5625	0.522
5/8	26	0.0385	0.6250	0.584
11/16	26	0.0385	0.6875	0.647
3/4	26	0.0385	0.7500	0.709
1	26	0.0385	1	0.959
1 3/8	24	0.0417	1.625	1.326

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British Standard Cycle Thread

British Standard Cycle is a British Imperial screw thread standard.

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