Low Head Socket Head Cap Screw Black Steel 1/2-13 * 3" Grade 8 [Cup Point] [Allen Drive] Quantity:Unity The screw has a length

The screw has a length of 3-3/4 and a thread of 7/16-20

noncorrosive environments

This rod has a length of 36 and a thread of 1-1/4-12

This hexagonal bolt has a length of 6" with a threading of 1-1/4-7 [Partially Threaded]

they'reabout 25%stronger than medium-strength steel locknuts

Low Head Socket Head Cap Screw Black Steel 1/2-13 * 3" Grade 8 [Cup Point] [Allen Drive] Quantity:Unity The screw has a lengthMade of alloy steel, these low profile screws are nearly twice as strong as their stainless steel counterparts. With half the height of a standard socket head, these low profile screws fit in tight spaces, but are weaker than standard socket heads. Length is measured from under the head. Black oxide steel screws are mildly corrosion resistant in dry environments. Coarse threads are the industry standard: choose these screws if you dont know the pitch