Note: Self tapping thread protectors have 1-2 threads molded-in to get them started. As nuts are turned onto threaded shaft, they self-tap the remaining distance creating a snug theaded fit.

H = Height
D = Washer Diameter
Unit of Measure


Thread Size

N/A 3/8 - 16

Acorn Hex Nut Size

N/A 9/16"


N/A .560"

Washer Diameter

N/A .680"

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