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They're angled under the head to sit flush within countersunk holes
The screw has a length of 3-1/2" and a thread of 9/16-12
The screw has a length of 3" and a thread of 1-1/2-6
5 and comply with dimensional standards
The screw has a length of 4-1/2" and a thread of 1-3/4-5
Socket Head Cap Screw Fine Thread Black Steel 1-3/8-12 * 4-1/2" Grade 8 [Cup Point] [Allen Drive] thread_size_9-16-18 They're angled under the headWith 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 1 2 and a thread of 1 3 8 12. Alloy steel screws are mildly corrosion resistant in dry environments. Fine and extra fine threads are closely spaced to prevent loosening from vibration: the finer the thread, the better the resistance. They are not compatible with coarse threads.
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