2-4 1/2 A563 Grade A Heavy Hex Nut Plain

They’ll also withstand excessive and repeated weight bearing

The anchor’s flange nylon head provides additional stability when installing into hollow materials

#21 Heavy Duty Jobber Drill Bit

3/16 x 4 Powers Flat Toggle Bolt Zinc Plated (50)

1/2 Cobalt Heavy Duty Jobber Drill Bit (6) Jobber Drill Bits - Wire Gauge 2-4 1/2 A563 Grade A1 2 Cobalt Heavy Duty Jobber Drill Bit . Heavy duty construction made to Type J aircraft specifications. Used for drilling holes in hard, tough materials such as stainless steel, titanium, high temperature and high strength alloys. High red hardness of cobalt permits speeds 30% greater than standard heavy duty split point (HSS) drills.