Metallics JG8HC761 Bolts 7/16-14 x 1 G8 HXBT St-zn (Jar 25)

It's a 7/16-14 coarse thread bolt, 1 inch long. Thread pitch is 14 threads per inch and the measured shank diameter runs 0.4305 to 0.4375 inch, so it mates with any 7/16-14 nut or tapped hole. Fastener length is 1 inch, which is grip plus whatever thread stands clear.

Grade 8 is the step up from Grade 5. This bolt is rated 150,000 psi minimum tensile and 130,000 psi minimum yield, hardened to Rockwell C33-39, made from medium carbon steel in the AISI 1021-1045 range and heat treated. That's the spec used in automotive and fleet work where Grade 5 tensile isn't enough. If your drawing or OEM torque spec calls for Grade 5, don't substitute up without checking the joint, since the higher-strength bolt takes more torque to reach the same clamp.

Metallics lists the JG8HC761 as both ARRA compliant and Buy American compliant. Country of origin is recorded as multiple, so if your contract requires a single named origin on the submittal, that's the detail to pin down before the material goes on a pay application.

The hex head measures 0.612 to 0.625 inch across the flats, so a 5/8 inch socket or wrench is the fit. Head height is 19/64 inch, which matters if you're working in a counterbored or shallow recess.

They ship in a jar of 25. The order minimum is 50 each, so you're buying two jars at a time. Jar weight on record is 1347 g. Metallics notes other sizes and quantities are available by request if 7/16-14 x 1 isn't the length you need.

The finish is zinc over steel, which handles indoor and sheltered outdoor service and gives light corrosion resistance. It is not a stainless or hot dip galvanized bolt, so for direct weather exposure, coastal air, or anything in standing water or chemical contact, specify a coating suited to that. Note also that zinc plating on a Grade 8 bolt means normal care about hydrogen embrittlement practice in highly loaded joints.

Overall length is 1 inch measured under the head, so your material stack plus washers has to be meaningfully less than that to leave nut engagement. On a short bolt like this the thread typically runs most or all of the length, which is fine for a through bolted bracket or a tapped hole, but if you need a defined grip length under a shear plane, step up to a longer length in the same G8HC series rather than relying on this one.