5/16" "High Strength" Flat Head Screws from ProTek R/C. These are made from standard grade 8 steel which has a minimum tensile strength of 180,000 PSI. These screws are the strongest you ...
Strength" Button Head Screws from ProTek R/C. These are made from metric grade 12.9 steel which has a minimum tensile strength of 174,000 PSI. These screws are the strongest you can get ...