Metallics JG5HTB44 Bolts 3/8-16 X 3/4 G5 Hx Tap Blt St- (Jar 100)

The JG5HTB44 hex tap bolt is a 3/8 inch diameter bolt with 16 threads per inch, right hand thread, made to ASME B18.2.1-2012. Measured body diameter runs 0.3690 to 0.3750 inch, so it drops through a standard 3/8 inch clearance hole. Match the nut or tapped hole to 16 TPI before you order; a 3/8-16 nut is not interchangeable with 3/8-16 only if the mating part is cut to a different pitch.

Grade 5 is the normal choice for that work. These bolts are medium carbon steel, heat treated, with 120,000 psi minimum tensile strength and 92,000 psi minimum yield, hardness Rockwell C25-34. Metallics calls out motor-to-machinery mounting and automotive and truck repair as the typical uses. If your drawing specifies Grade 8, do not substitute these; Grade 8 carries higher tensile and yield values and the spec exists for a reason.

A hex tap bolt is fully threaded up to the head, which is what separates it from a hex cap screw with a plain grip length. That matters when you are pulling two parts tight on a short stack, like bolting a motor base to a machine frame, because you get thread engagement through the entire length instead of an unthreaded shank sitting in the tapped hole. Metallics lists the JG5HTB44 as a Grade 5 hex tap bolt in zinc-plated steel.

The JG5HTB44 is zinc plated steel, which is a mild corrosion barrier suited to indoor and sheltered use. For sustained wet exposure, washdown areas, or coastal work, specify 18-8 stainless hex tap bolts instead. Metallics notes other sizes and quantities are available by request.

Metallics flags the JG5HTB44 as Buy American compliant and ARRA compliant, with country of origin China. For federally funded work, run both flags past your project's specific domestic-content clause before you commit, since the thresholds differ by funding program.

They ship 100 pieces in a jar, and 100 count is the order minimum, so a jar is the smallest buy. The packed jar weighs 1628 g. For MRO stockrooms that is a convenient bin unit; for a one-off repair it is more bolts than the job needs.

Material is carbon steel in the AISI 1008 to 1026 range, heat treated to reach Grade 5 properties. That is a weldable-grade base steel, but heat treating the bolt is what gives it its strength, so welding or torch-heating one of these will destroy the Grade 5 rating.