Metallics JHHN58 Nuts 5/8-11 Hvy Hx Nut St-zn (Jar 28)

Yes, as long as the rod is 5/8-11 UNC. The JHHN58 is a 5/8-11 heavy hex nut, 11 threads per inch, which is the standard coarse pitch for 5/8 inch rod and bolts. It will not run on 5/8-18 fine thread.

Grade 2 steel, with hardness in the Rockwell B68 to C32 range. Grade 2 heavy hex is the normal choice for mating with low carbon all-thread rod on electrical, plumbing, and HVAC hanger work. If the engineer specified a Grade 5 or Grade 8 bolt assembly, the nut needs to match that grade, not Grade 2.

No. The JHHN58 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded job with domestic sourcing requirements you will need a domestically produced heavy hex nut instead.

Heavy hex is the larger pattern: wider across the flats and thicker than a finished hex nut of the same thread, so it spreads load over a bigger bearing area and takes more wrench torque without rounding. The JHHN58 is the heavy pattern in 5/8-11, 1.031 to 1.062 inches across the flats. Use it on structural connections, pipe hanger rod, and anywhere the drawing calls out heavy hex. If your bolt hole or a tight clearance was laid out for a standard hex nut, the heavy nut may not clear.

The JHHN58 is zinc plated steel, which handles indoor and sheltered exterior work and resists ordinary humidity. It is not stainless. For wet, coastal, chlorinated, or chemically aggressive locations, go to an 18-8 stainless heavy hex nut in the same 5/8-11 thread instead.

The JHHN58 ships as a jar of 28 nuts. The order minimum is 25 each. Jar packaging keeps them together on the cart or in the gang box rather than loose in a bin.

Yes. The JHHN series runs other sizes and pack quantities by request, so if you need a bulk box rather than the 28 count jar, or a different thread diameter for the same job, it can be sourced.