Does anyone know what the lug with a hole on one of the hex flats on male camlock is for?
I'd debate the impractical carryover, keeping junk out of irrigation pipes is important and without securing the caps to the camlock, someone will always either drop them in the dirt or wander off with them in a pocket.It's for chain lashing a dust cap. It's an impractical carryover from the larger sizes such as those found on the side of tanker trucks. If you ever see a delivery happening at a gas station, you'll see the 3" dust caps hanging from the truck.
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