Metallics JG8HC46 Bolts 1/2-13 X 1 G8 Hxbt St-zn (Jar 50)

It's a 1/2-13 bolt, 1 inch long. The 13 threads per inch is the UNC coarse pitch for 1/2 inch diameter, so it takes a standard 1/2-13 coarse nut or a tapped 1/2-13 hole. At 1 inch of overall length, allow for the thickness of what you're clamping plus the nut, since short grade 8 bolts in this length are typically threaded most of the way.

Grade 8 is the step up. The JG8HC46 is rated at 150,000 psi minimum tensile and 130,000 psi minimum yield, with a Rockwell C33-39 hardness from heat treating medium carbon steel. Metallics calls it out for automotive and fleet work where grade 5 doesn't carry enough tensile. For general bracket, strut, and equipment mounting a grade 5 or 18-8 stainless is usually fine; reach for grade 8 when the joint is highly loaded or spec'd for it. Note the trade-off: harder steel is less ductile and more notch sensitive, so grade 8 is not the right choice where shock loading or corrosion cracking is a concern.

No. The JG8HC46 is listed as not Buy American compliant and not ARRA compliant, with country of origin shown as multiple. For a project with domestic sourcing requirements you'll need a domestically produced grade 8 hex bolt instead.

The finish is zinc plating over steel, which is a general indoor and sheltered-use coating. It handles damp mechanical rooms and occasional moisture, but it is not a marine or continuously wet finish. For exterior exposure, roof curbs, or washdown areas, use a hot dip galvanized or stainless fastener instead.

Fifty bolts, supplied in a jar, and 50 each is also the order minimum. The jar packaging suits a service van or a shop bin where you're pulling a few at a time rather than a bulk box. Other sizes and quantities in the G8HC and JG8HC series are available by request.

No. The jar contains bolts only, 50 of them. You'll need to order 1/2-13 nuts separately, and grade 8 practice is to pair the bolt with a matching grade nut and hardened flat washers so the clamp load doesn't embed the head or nut into the joint.

Medium carbon steel to AISI 1021 through 1045, heat treated, which is what gets it to the Rockwell C33-39 hardness and the grade 8 strength numbers. It's a plain carbon steel cap screw, not alloy stainless, so corrosion protection comes entirely from the zinc plating.

Hex head. It's a hex cap screw with a six-point head, so it drives with a standard wrench or socket, which for a 1/2-13 cap screw is normally a 3/4 inch across the flats.

Yes, that's the stated field application: electrical, plumbing, heating and air conditioning work. In practice that's equipment anchoring, motor and compressor mounts, and heavy support steel where the connection is load bearing. For light strut and conduit hanging, a grade 5 or stainless fastener is usually all the job calls for.