Square Head Screw Full Thread Black-Oxide Alloy Steel 1-8 * 3-1/2" Grade 8 [Cup Point] [External Square Drive] Quantity:Unity This hexagonal bolt has a

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

They thread on from the bottom of the nut

The screw has a thread of 1-8 and a length of 2-1/2"

Travel distance per turn

Square Head Screw Full Thread Black-Oxide Alloy Steel 1-8 * 3-1/2" Grade 8 [Cup Point] [External Square Drive] Quantity:Unity This hexagonal bolt has aUse 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 3 1 2" and a thread of 1 8.