Socket Head Cap Screw Black Steel 1-1/2-6 * 6-1/2" Grade 8 [Cup Point] [Allen Drive] thread_size_5-16-18 the base expands as you

the base expands as you tighten the nut for a secure hold in concrete

Black-oxide alloy steel set screws resist corrosion in dryenvironments

The screw has a length of 2-3/4" and a thread of 3/4-10

The screw has a length of 3-3/4" and a thread of 1-1/4-7

These 18-8 stainless steel screws have good chemical resistance and may be mildly magnetic

Socket Head Cap Screw Black Steel 1-1/2-6 * 6-1/2" Grade 8 [Cup Point] [Allen Drive] thread_size_5-16-18 the base expands as youWith 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 screws have a thread of 1 1 2 6 and a length of 6 1 2. 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 or threads per inch. Screws that meet ASTM A574, ASTM A574M, and ISO 898 1 comply