Unified Fine

Commonly used where higher tensile strength materials are used and maximum length of engagement between external and internal threads is useful. This thread may be found in products of the clampnut series (CNF, CNF-A, CNF-S, SNF, SNF-A, SNF-S).



Recommended Shaft/Spindle Thread Dimensions

Threads Major Dia Pitch Dia Minor Dia
Thread Size Per Inch Max Min Max Min Max
10 - 32 32 0.1900 0.1840 0.1697 0.1674 0.1517
1/4 - 28 28 0.2500 0.2435 0.2268 0.2243 0.2062
5/16 - 24 24 0.3125 0.3053 0.2854 0.2827 0.2614
3/8 - 24 24 0.3750 0.3678 0.3479 0.3450 0.3239
7/16 - 20 20 0.4375 0.4294 0.4050 0.4019 0.3762
1/2 - 20 20 0.5000 0.4919 0.4675 0.4643 0.4387
5/8 - 18 18 0.6250 0.6163 0.5889 0.5854 0.5568
3/4 - 16 16 0.7500 0.7406 0.7094 0.7056 0.6733
7/8 - 14 14 0.8750 0.8647 0.8286 0.8245 0.7874
1-14 14 1.0000 0.9897 0.9536 0.9494 0.9124
1 - 12 12 1.0000 0.9886 0.9459 0.9415 0.8978
1 1/8 - 12 12 1.1250 1.1136 1.0709 1.0664 1.0228
1 1/4 - 12 12 1.2500 1.2386 1.1959 1.1913 1.1478
1 3/8 - 12 12 1.3750 1.3636 1.3209 1.3162 1.2728
1 1/2 - 12 12 1.5000 1.4886 1.4459 1.4411 1.3978
2-12 12 2.0000 1.9886 1.9459 1.9414 1.8978

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