Metric hex nuts are six-sided, internally threaded fasteners, mated with bolts, studs, screws, and other externally threaded products. The addition of the hex nut ensures that the bolt, etc., stays in place.

Metric heavy hex nuts are wider across the flats and thicker than hex nuts.
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METRIC HEAVY HEX 2H NUT, A194M/SA 194M, PLAIN (METRIC)

M12-1.75 METRIC HEAVY HEX NUT A194M GRADE 2H
Web Price $236.59
METRIC HEAVY HEX 2H NUT, A194M/SA 194M, PLAIN (METRIC)

M14-2.00 METRIC HEAVY HEX NUT A194M GRADE 2H
Web Price $251.19
METRIC HEAVY HEX 2H NUT, A194M/SA 194M, PLAIN (METRIC)

M16-2.00 METRIC HEAVY HEX NUT A194M GRADE 2H
Web Price $230.92
METRIC HEAVY HEX 2H NUT, A194M/SA 194M, PLAIN (METRIC)

M18-2.50 METRIC HEAVY HEX NUT A194M GRADE 2H
Web Price $251.42
METRIC HEAVY HEX 2H NUT, A194M/SA 194M, PLAIN (METRIC)

M20-2.50 METRIC HEAVY HEX NUT A194M GRADE 2H
Web Price $221.26
Diameter N/A M12 N/A M14 N/A M16 N/A M18 N/A M20
Pitch N/A Coarse
Length N/A
Material N/A A194M Grade 2H
Finish N/A Plain
Package Quantity N/A 700 N/A 500 N/A 350 N/A 250 N/A 175