7/8-9 x 3 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

11/32 Cobalt Heavy Duty Jobber Drill Bit

or even if you’re just a do-it-yourself enthusiast

7/8-9 x 4 1/2 Grade 5 Hex Cap Screw Zinc Plated

19/64 Cobalt Heavy Duty Jobber Drill Bit (12) 3/4-10 Hex Tap Bolts 18-8 Stainless Steel 7/8-9 x 3 1/2 Grade19 64 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.