Threading Tables

Cycle Engineer's Standard Threads (60 Deg) Dimensions in Inches except where stated
Thread Form Data
Diameter	O/Diameter	Core	Radius	Depth	Pitch	Effective Dia	T.P.I	Tapping Drill
17 IWG**	0.056	0.0388	0.002687	0.0086	0.01613	0.0474	62	No 61
16 IWG	0.064	0.0468	0.002687	0.0086	0.01613	0.0554	62	3/64"
15 IWG	0.072	0.0548	0.002687	0.0086	0.01613	0.0634	62	No 54
14 IWG	0.080	0.0628	0.002687	0.0086	0.01613	0.0714	62	1.60mm
13 IWG	0.092	0.0730	0.002982	0.0095	0.0179	0.0825	56	No 49
12 IWG	0.104	0.0798	0.00378	0.0121	0.0227	0.0919	44	No 46
1/8"	0.125	0.0984	0.004165	0.0133	0.0250	0.1117	40	2.5mm
0.154"	0.154	0.1274	0.004165	0.0133	0.0250	0.1407	40	No 30
0.175	0.175	0.1417	0.005214	0.0166	0.0313	0.1584	32	3.6mm
3/16"	0.1875	0.1542	0.005214	0.0166	0.0313	0.1709	32	5/32"
1/4"	0.250	0.2090	0.006414	0.0205	0.0385	0.2295	26	No 4
0.266"	0.266	0.2250	0.006414	0.0205	0.0385	0.2455	26	No 1
0.281"	0.281	0.2400	0.006414	0.0205	0.0385	0.2605	26	6.10mm
5/16"	0.3125	0.2715	0.006414	0.0205	0.0385	0.2920	26	7mm
3/8"	0.375	0.3340	0.006414	0.0205	0.0385	0.3545	26	8.50mm
9/16"	0.5625	0.5092	0.006414	0.0266	0.0385	0.5359	26	13mm
1"	1.00	0.9590	0.006414	0.0205	0.0385	0.9795	26	24.50mm
1.29"	1.290	1.2456	0.006947	0.0222	0.0417	1.2678	24	1.25"
1.37"	1.370	1.3256	0.006947	0.0222	0.0417	1.3478	24	1-21/64"
1-7/16"	1.4375	1.3931	0.006947	0.0222	0.0417	1.4153	24	35.50mm
1-1/2"	1.500	1.4556	0.006947	0.0222	0.0417	1.4778	24	37mm

**IWG = Imperial Wire Gauge Wire gauge sizes are for spokes, larger sizes for hubs and pedals

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