Socket Head Cap Screw Black Steel 1-1/8-7 * 4-1/2" Grade 8 [Cup Point] [Allen Drive] Quantity:Unity The screw has a length

The screw has a length of 4-3/4" and a thread of 1-1/2-6

but their holding power lessens with each use

With a tensile strength of170

The screw has a length of 8" and a thread of 7/8-9

Socket Head Cap Screw Black Steel 1-1/8-7 * 4-1/2" Grade 8 [Cup Point] [Allen Drive] Quantity:Unity The screw 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 screws have a thread of 1 1 8 7 and a length of 4 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