Unified Coarse

Commonly used where greater depth of thread better resists stripping of internal thread. This thread may be found in certain products of the clampnut series (CNC, CNC-A, CNC-S, SNC, SNC-A, SNC-S).



Recommended Shaft/Spindle Thread Dimensions

Threads Major Dia Pitch Dia Minor Dia
Thread Size Per Inch Max Min Max Min Max
8 - 32 32 0.1640 0.1580 0.1437 0.1415 0.1257
10 - 24 24 0.1900 0.1828 0.1629 0.1604 0.1389
1/4 - 20 20 0.2500 0.2419 0.2175 0.2147 0.1887
5/16 - 18 18 0.3125 0.3038 0.2764 0.2734 0.2443
3/8 - 16 16 0.3750 0.3656 0.3344 0.3311 0.2983
7/16 - 14 14 0.4375 0.4272 0.3911 0.3876 0.3499
1/2 - 13 13 0.5000 0.4891 0.4500 0.4463 0.4056
5/8 - 11 11 0.6250 0.6129 0.5660 0.5619 0.5135
3/4 - 10 10 0.7500 0.7371 0.6850 0.6806 0.6273
7/8 - 9 9 0.8750 0.8611 0.8028 0.7981 0.7387
1 - 8 8 1.0000 0.9850 0.9188 0.9137 0.8466
1 1/8 - 7 7 1.1250 1.1086 1.0322 1.0268 0.9497
1 1/4 - 7 7 1.2500 1.2336 1.1572 1.1517 1.0747
1 3/8 - 6 6 1.3750 1.3568 1.2667 1.2607 1.1705
1 1/2 - 6 6 1.5000 1.4818 1.3917 1.3856 1.2955
1 3/4 - 5 5 1.7500 1.7295 1.6201 1.6134 1.5046
2 - 4 1/2 4 1/2 2.0000 1.9780 1.8557 1.8486 1.7274
2 1/4 - 4 1/2 4 1/2 2.2500 2.2280 2.1057 2.0984 1.9774
2 1/2 - 4 4 2.5000 2.4762 2.3376 2.3298 2.1933

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