Square Head Screw Full Thread Black-Oxide Alloy Steel 1-81-8 * 6" Grade 8 [Cup Point] [External Square Drive] left_thread These nuts are classified as

These nuts are classified as ASME B18

The screws have a thread of 1-1/2-6 and a length of 9-1/2

This hexagonal bolt has a length of 3-3/4" with a threading of 3/4-16 [Partially Threaded]

and work tables

Square Head Screw Full Thread Black-Oxide Alloy Steel 1-81-8 * 6" Grade 8 [Cup Point] [External Square Drive] left_thread These nuts are classified asUse 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 6" and a thread of 1 81 8.