Metallics JHTB34 Bolts 1/2-13 X 2-1/2 Hx Tap Blt St-zn (Jar 50), 100 Pack

The JHTB34 is a 1/2-13 hex tap bolt, so 1/2 inch diameter with 13 threads per inch, right hand thread, in a 2-1/2 inch length. It mates with standard 1/2-13 nuts, strut channel nuts, and tapped 1/2-13 holes.

A hex tap bolt is threaded all the way to the head rather than having a plain shank under it. That is why the JHTB34 is called out for complete thread engagement applications: when you are running into a tapped hole, a strut nut, or a thin bracket, the full thread means the fastener grips no matter how much of it is buried. If you need a smooth bearing shank through a clearance hole, a partially threaded cap screw is the better choice.

The JHTB34 is steel with a zinc finish, which is a general purpose plating meant for dry indoor and protected locations. It handles normal indoor mechanical and electrical rooms fine, but in a corrosive, coastal, or continuously wet environment stainless is the safer call. Metallics runs the same hex tap bolt in 18-8 stainless under the JSHTB series if you need that.

Rated at 60,000 psi minimum tensile with a hardness of Rockwell B69 to B100. That is a standard low carbon grade bolt, fine for strut, conduit racks, equipment mounting, and general hanger work. If your drawing calls for a Grade 5 or Grade 8 fastener for a structural or high load connection, this is not that bolt.

No. The Metallics JHTB34 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. For federally funded work carrying domestic sourcing requirements you need a domestically produced fastener instead.

Head width across flats measures 0.725 to 0.750 inch, so a 3/4 inch wrench or socket is what you want on it. That is the standard hex for a 1/2 inch bolt.

They ship in a jar, with an order minimum of 50 pieces. The jar packaging keeps loose 1/2-13 hardware together on a truck or in a gang box rather than in a torn bag.

Threads are made to IFI-199 (2014), right hand. Any standard 1/2-13 nut, washer, or tapped hole will take them, so you can mix them with 1/2-13 hardware already on the job.

Metallics lists it for electrical, plumbing, heating, and air conditioning work, specifically where complete thread engagement is wanted. Typical uses are strut and channel assemblies, conduit and pipe hanger hardware, and equipment or enclosure mounting where the bolt threads into a tapped part.

Yes. The hex tap bolt runs as a family, the HTB, JHTB, and JSHTB series, and Metallics notes other sizes and quantities are available by request. JHTB34 is the 1/2-13 by 2-1/2 inch zinc plated steel version packed in a jar.