Content:
1/4 unf has 28 threads per inch. 5/16 unf has 24 threads per inch.
1/4 x 1/2 10x 5/16 x 1/2 5x
1/4 x 5/8 10x 5/16 x 5/8 6x
1/4 x 3/4 10x 5/16 x 3/4 6x
1/4 x 1 8x 5/16 x 1 5x
1/4 x 1.1/4 6x 5/16 x 1.1/4 5x
1/4 x 1.1/2 5x 5/16 x 1.1/2 4x