Metallics JG5HTB77 Bolts 1/2-13 x 6 G5 Hx Tap Blt St-zn (Jar 25)

Yes. A hex tap bolt is fully threaded, which is what separates it from a hex cap screw of the same 1/2-13 x 6 size that would have a plain shank under the head. Full thread means you can set the grip anywhere along the 6 inch length and still get thread engagement in the tapped hole, which is why it works for bolting a motor base to machinery where the thickness of the stack varies. Threads are 13 per inch, right hand.

The shank runs 0.4930 to 0.5000 inch outside diameter, so a clearance hole for a 1/2 inch bolt is what you want in the parts being joined. For a tapped hole, standard 1/2-13 UNC tapping practice applies since the thread is 13 TPI right hand to ASME B18.2.1-2012. Across the corners the head measures 0.840 to 0.866 inch, which is the figure to check if you are counterboring or working in a tight pocket.

Yes. The hex head measures 0.736 to 0.750 inch across the flats, so a 3/4 inch wrench or socket is the correct size. Wrenching height on the head is 0.215 inch, so a thin-wall socket seats properly without riding up on the head radius.

Grade 5 is the normal choice for motor and machinery mounting. These bolts are medium carbon steel, heat treated, with 105,000 psi minimum tensile and yield and a hardness of Rockwell C19-30. Grade 8 only earns its place where the joint is highly loaded or shock loaded and you are torquing to a higher preload. For bolting a motor base, pump frame, or truck and automotive repair work, Grade 5 at 1/2-13 is the standard spec.

Zinc plating over steel handles indoor and sheltered outdoor duty, equipment rooms, shop floors, mechanical spaces. For constant wetness, washdown, coastal exposure, or chemical contact, zinc plated steel will eventually corrode and stainless is the better pick. The underlying material here is steel to AISI 1008-1026 with a zinc finish.

The JG5HTB77 ships as a jar of 25 bolts, and 25 count is the order minimum, so the jar is the smallest unit. If you need a different size or a different pack quantity of the same 1/2-13 Grade 5 hex tap bolt, Metallics offers it by request under the G5HTB and JG5HTB series.

The record marks these bolts compliant for both ARRA and Buy American, with country of origin China. On federally funded work the two can be read differently by different specifying authorities, so match the compliance clause on your drawing against those entries before you submit.