Flat Head Cap Screw Black Steel 1/2-13 * 9" Grade 8 [Cup Point] [Allen Drive] asme_b18-5 They include a tag that

They include a tag that shows the material

This hexagonal nut fit a threading of 1-1/2-6

The screws have a thread of 1-3/4-5 and a length of 16

use these screws with Grade 9 nuts and screws

The rod has a thread of 3/4-10 and a length of 144"

Flat Head Cap Screw Black Steel 1/2-13 * 9" Grade 8 [Cup Point] [Allen Drive] asme_b18-5 They include a tag thatMade from alloy steel, these screws are nearly twice as strong as stainless steel flat head screws. They're angled under the head to sit flush within countersunk holes. Length is measured from the top of the head. The screw has a length of 9" and a thread of 1 2 13. Black oxide alloy steel screws have mild corrosion resistance in dry environments.