For diameters under 1 ½ inches

The high strength

3 USS Flat Washer Zinc Plated

make sure you choose the carefully curated selection of high-quality fasteners you’ll find with us

18% chromium and 8% nickel for good corrosion resistance

3/16 Cobalt Heavy Duty Jobber Drill Bit (12) Cap Nuts Nickel Plated For diameters under 1 ½3 16 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.