3/8 inch reduced shank with ground flute of M2 high speed steel

For diameters under 1 ½ inches

1-14 x 3 1/2 Grade 8 Hex Cap Screw Yellow Zinc Plated

3/4-10 x 3 Hex Cap Screw SS 18-8 (A2)

3 USS Flat Washer Zinc Plated

3/16 Cobalt Heavy Duty Jobber Drill Bit (12) Cap Nuts Nickel Plated 3/8 inch reduced shank with3 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.