Square Head Screw Full Thread Black-Oxide Alloy Steel 1-8 * 4" Grade 8 [Cup Point] [External Square Drive] Quantity:Unity The screws have a thread

The screws have a thread of 5/8-11 and a length of 12

This hexagonal bolt has a length of 10-1/2" with a threading of 1/2-13 [Partially Threaded]

This hexagonal bolt has a length of 12-1/2" with a threading of 1-8 [Partially Threaded]

Furthermore

Square Head Screw Full Thread Black-Oxide Alloy Steel 1-8 * 4" Grade 8 [Cup Point] [External Square Drive] Quantity:Unity The screws have a threadUse these set screws for light duty holding. A square head allows them to be turned by hand, or fastened with a wrench when you need more torque. The cup point has a thin edge that digs into the contact surface for a secure hold. Length is measured from under the head. The screw has a length of 4" and a thread of 1 8.