These custom Grade 5 #12 X 1-3/4" type AB sheet metal screws were manufactured to SAE J429 specifications with 25-34 core hardness, 120 KSI min tensile strength, and 92 KSI min yield strength.  Dacromet zinc flake coating was applied to complete the parts and a raised dot was incorporated to help our construction customer easily distinguish between these Grade 5 screws and the standard low carbon version also in use.