Metallics JN174 Nuts 1-8 Hx Nut St-zn (Jar 25)

The JN174 is a 1-8 hex nut, meaning a 1 inch nominal diameter with 8 threads per inch, which is the standard UNC coarse pitch for 1 inch rod. It threads onto 1 inch coarse all-thread, anchor bolts, or hanger rod. It will not run onto 1 inch fine thread (1-12 or 1-14) rod.

No. The JN174 is a Grade 2 steel nut, hardness Rockwell B68 to C32. Grade 2 is the low carbon, general purpose strength class, so pairing it with a Grade 5 or Grade 8 bolt in a loaded connection means the nut strips before the bolt reaches its rated clamp load. For higher strength joints, step up to a Grade 5 or Grade 8 hex nut of the same 1-8 thread.

Yes, the JN174 is built to the ASME B18.2.2 thread standard, which is the dimensional spec for inch series hex nuts. That matters on spec driven work: it means the 1-1/2 inch across flats and the 0.831 to 0.887 inch thickness fall inside a recognized standard rather than a house dimension, so it interchanges with any other B18.2.2 1-8 hex nut.

Across the flats the nut measures 1.450 to 1.500 inches, so a 1-1/2 inch wrench or socket is the one to grab. Nut height runs 0.831 to 0.887 inches.

The JN174 is steel with a zinc finish, which gives moderate corrosion protection for indoor, covered, or dry service. For sustained outdoor exposure, wet locations, or coastal air, hot dip galvanized or 18-8 stainless 1-8 nuts are the better call. Also keep dissimilar metals in mind: zinc plated steel against a galvanized or stainless rod is a mismatch worth avoiding on long runs.

The JN174 ships as a jar of 25 nuts, and 25 count is the order minimum, so it is sold by the jar rather than individually. Other sizes and quantities are available by request.

Metallics lists the JN174 as both ARRA compliant and Buy American compliant, with country of origin China. If your project's Buy America provision is the stricter domestic melt and manufacture type, confirm against the governing contract clause, since compliance flags and origin are separate data points.