Description
The Premco 9/16-12 x 5.5 bolt you’re referring to appears to be a Grade 5 or Grade 8 hex cap screw with the following typical specifications:
Length: 5.5 inches
Material: Medium carbon steel (Grade 5) or alloy steel (Grade 8)
Finish: Zinc-plated (silver or yellow) for corrosion resistance
Head Type: Hex
Thread Type: Partial thread (common for longer bolts
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