Stainless Steel Clevis pins and rings.

Pins: Example - "3/16 x 1/2" means the pin is 3/16's of an inch in diameter on the shank of the pin and there is 1/2 inch between the head and the hole.

Rings: Example - "5/8 dia - for 3/16, 1/4 pins" means the ring is 5/8 of an inch in diameter and that it fits pins with either 3/16 of an inch or 1/4 of an inch diameter shanks of any length.