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#57 Heavy Duty Drill Bit - Stubby Length
Hardness for plain and zinc plated washers is HRC 38-45 and HRC 26-45 for hot-dip galvanized washers per ASTM F436
#34 Heavy Duty Drill Bit - Stubby Length
1-14 x 3 1/2 Grade 5 Hex Cap Screw Zinc Plated
5/64 Heavy Duty Drill Bit - Stubby Length (12) 7/8-14 Grade 8 Hex Cap Screws Yellow Zinc Plated #57 Heavy Duty Drill Bit5 64 Heavy Duty Drill Bit Stubby Length . Designed for use in machines and portable drilling in hard sheet metal alloys such as stainless steel and titanium.
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