Metallics G8HC752 Bolts 3/4-10 X 2 G8 Hxbt St-Yzn (Box 25)

It's a 3/4-10 hex cap screw, 2 inches long. Coarse thread at 10 threads per inch, with a measured major diameter of 0.7410 to 0.7500 inch, so it mates with standard 3/4-10 UNC nuts and tapped holes. With only 2 inches of length, usable grip is short, so stack up your plate thicknesses plus washers before ordering.

Grade 8 is the step up from Grade 5. The G8HC752 is rated 150,000 psi minimum tensile and 130,000 psi minimum yield, from medium carbon steel heat treated to Rockwell C33-39. That's why it gets used in automotive and fleet work where Grade 5 doesn't carry the load. Grade 8 is harder and less ductile, so don't substitute it where a design calls out a specific lower grade for yield behavior.

No. The G8HC752 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On federally funded or domestic-content jobs, these won't satisfy the requirement and you'll need a domestic-sourced Grade 8 fastener instead.

The hex head measures 1.100 to 1.125 inch across the flats, which is a 1-1/8 inch socket or wrench. Head height runs 0.455 to 0.483 inch. Across corners the head measures 1.240 to 1.299 inch, which matters if you are driving it inside a counterbore or tight channel.

The finish is yellow zinc over steel, which is a plating meant for mild exposure and indoor or sheltered equipment service. It slows surface rust but is not a hot-dip galvanized or stainless solution. For sustained weather, wash-down, or coastal exposure, specify a different corrosion system rather than relying on this plating.

They ship as a box of 25, and 25 each is the order minimum, so partial quantities are not sold. Other sizes and quantities are available by request if 3/4-10 x 2 in a 25 count isn't what the job needs.

Medium carbon steel in the AISI 1021 to 1045 range, quench and tempered to Rockwell C33-39. That heat treatment is what gets the 150,000 psi tensile out of it. It also means these should not be welded or re-heated, since that destroys the temper and the grade rating with it.

The G8HC752 is a hex head cap screw, the type described as a cap screw in Grade 8. Practically it's ordered and used as a hex bolt: hex head driven with a wrench, full 3/4-10 thread engagement into a tapped hole or a nut. If your drawing calls for a structural bolt with a heavy hex head, that is a different part, not this one.