Socket Head Cap Screw Full Thread Black Steel 1-3/4-5 * 4" Grade 8 [Cup Point] [Allen Drive] flat_head_cap_screw It is made of black

It is made of black plated and thus provide medium resistance to corrosion in both dry and wet environments

It is made of yellow zinc plated and thus provide medium resistance to corrosion in dry environments and low resistance in wet environments

2 and comply with dimensional standards

The screws have a thread of 1-8 and a length of 4-1/2

With a tensile strength of 170

Socket Head Cap Screw Full Thread Black Steel 1-3/4-5 * 4" Grade 8 [Cup Point] [Allen Drive] flat_head_cap_screw It is made of blackWith 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 4" and a thread of 1 3 4 5. 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 with