Content:
1/4 unf has 28 threads per inch. 5/16 unf has 24 threads per inch.
1/4 x 5/8 10x 5/16x1 8x 3/8x3/4 4x
1/4 x 3/4 10x 5/16x1.1/4 5x 3/8x1 4x
1/4 x 1 6x 5/16x2 4x 3/8x1.1/4 2x
1/4 x 2 6x 3/8x2 2x