Content:
3/8 unf has 24 threads per inch. 7/16 unf has 20 threads per inch.
3/8 x 1/2 4x 7/16 x 1 4x
3/8 x 3/4 4x
3/8 x 1 6x
3/8 x 1.1/4 5x
3/8 x 1.3/4 4x
3/8 x 1.1/2 4x