Safety Factor of 5 Add PA to suffix for pre-assembled pipe clamps Includes Combination Recess Hex Head Machine Screw and Square Nut Material: 16 Ga. (1.5), 14 Ga. (1.9), 12 Ga. (2.6) ASTM A1011 33,000 PSI min. yield and 11 Ga. (3.0) ASTM A1011HSLA Gr. 50 Standard finishes: ZN, HDG, SS4, SS6, AL