While there may be several acceptable answers, for half a century or so the workhorse of the industry has been the Grade 5 carbon steel bolt, or, more properly, hex head cap screw. Each bolt is installed with two flat washers, a split-ring lock washer, and a hex nut. Zinc plated to retard corrosion. Diameter of bolt used should be compatible with hole in tang. Plated SAE, DIN compact, or Stainless Steel Flat washers to be used on BOTH sides. Consider use of Bellevilles for applications where. Is it grade 5 or 8 that should be used with Belleville washers for lug, busbar transformer terminations? Can you please provide a chart or reference material that states this? I used 304 SS. I never considered the need for grade 5 or 8. Answer #1 Use of the lug. In over 100 years of serving the electrical industry, Anderson and Fargo have earned a reputation for being creative leaders in the de-sign and manufacture of electrical connectors, fittings and related accessories. The acceptance of these responsibilities is best exem-plified through our wholly.
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