Sturdy 1/4″ Thick Gauge.
Includes shoulder posts to measure fine & coarse nuts, holes to measure metric & U.S. bolts, U.S. threads per inch gauge, metric pitch gauge, MM and inch rulers, metric nut size diagram & a bolt chart in MM & U.S. sizes.
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Metric Hardware 4mm thru 8mm.
Copper Sealing Rings in Metric sizes.
Resistant to rust and corrosion!
High quality studs & bolts.