Socket Head Cap Screw Fine Thread Black Steel 1-1/4-12 * 5-1/2" Grade 8 [Cup Point] [Allen Drive] metric_coarse This rod has a length

This rod has a length of 36 and a thread of 1/2-13

The screw has a length of 2-1/2" and a thread of 1/4-20

The rod has a length of 36 and a thread of 1-3/8-6

The screw has a length of 2-3/4" and a thread of 9/16-12

Socket Head Cap Screw Fine Thread Black Steel 1-1/4-12 * 5-1/2" Grade 8 [Cup Point] [Allen Drive] metric_coarse This rod has a lengthWith a tensile strength of 170,000 psi, these Alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head. The screw has a length of 5 1 2 and a thread of 1 1 4 12. Alloy steel screws are mildly corrosion resistant in dry environments. Fine and extra fine threads are closely spaced to prevent loosening from vibration: the finer the thread, the better the resistance. They are not compatible with coarse threads.