304 and 305 series stainless steels so 18-8 is used at times to designate any and all of those alloy groups

3/4-10 x 6 1/4 Simpson Wedge Anchor 304 SS (10)

6-20 x 1 7/8 Phillips Drywall Self Drill Screw Zinc Plated (4000)

18-8 stainless steel hex cap screws will have a typical composition of 18% chromium and 8% nickel

Precision ground for high degree of concentricity between shank and body diameter

#6 Heavy Duty Drill Bit - Stubby Length (12) Jobber Drill Bits - Cobalt 304 and 305 series stainless#6 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.