Metallics G8HC751 Bolts 3/4-10 X 1 G8 Hxbt St-Yzn (Box 50)

Yes, the G8 in the Metallics G8HC751 designation is Grade 8, the high strength carbon steel class used where a Grade 2 or Grade 5 fastener will not hold. It is identified in the field by the six radial lines on the head. Use it where the connection is structural or heavily loaded, and torque to the Grade 8 value rather than a generic figure.

Steel with a yellow zinc plating (the St-Yzn in the part description). Yellow zinc chromate gives better corrosion resistance than clear zinc for damp or occasionally wet locations, but it is a plated finish, not hot dip galvanized or stainless, so it isn't the right pick for continuous outdoor exposure, marine air, or direct ground contact. For those conditions go to a galvanized or stainless fastener.

No. The G8HC751 is the hex bolt only, 50 to the box. Order 3/4-10 nuts and 3/4 flat or lock washers separately, and match them to the bolt grade: pairing a Grade 8 bolt with a low grade nut gives up the strength you paid for.

At 1 inch under head, grip length is short. With a nut you need enough thread to fully engage it plus any washers, so a 3/4-10 x 1 generally suits thin plate or a tapped hole where only shallow engagement is available. If you are stacking two thick members plus washers, step up in length rather than running the nut off the end of the thread.

Fifty bolts per box. It is sold boxed rather than loose or bagged, so a single purchase covers a 50 piece bin for a shop or service truck of 3/4-10 x 1 inch Grade 8 hex bolts.

Order it as Metallics G8HC751. That is both the catalog designation and the manufacturer part number, and it describes a 3/4-10 by 1 inch Grade 8 hex bolt in steel with yellow zinc plating, boxed 50.