Metallics JG8HC47 Bolts 1/2-13 X 1-1/2 G8 Hxbt St-zn (Jar 25)

It's a 1/2-13 x 1-1/2 inch hex cap screw, so 1/2 inch diameter with 13 threads per inch, which is standard UNC coarse thread for that diameter. Length is 1-1/2 inches under the head. It mates with any standard 1/2-13 nut or tapped hole.

Grade 8 is the step up. The JG8HC47 is rated 150,000 psi minimum tensile and 130,000 psi minimum yield, with a hardness of Rockwell C33-39. Grade 5 of the same diameter runs lower on both counts, so Grade 8 is what gets specified when the connection is highly loaded or sees vibration and shock. The trade-off is that the harder heat-treated steel is less ductile, so torque it to the Grade 8 value rather than guessing off a Grade 5 chart.

No. The JG8HC47 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements, you'll need a domestically produced Grade 8 bolt instead.

The bolt is medium carbon steel with a zinc finish. Zinc plating handles indoor and sheltered exterior service fine, but it is a sacrificial coating, not stainless, so on a coastal rooftop or anywhere washed down regularly it will eventually surface rust. For wet or corrosive duty, hot-dip galvanized or stainless is the better call, keeping in mind stainless will not give you Grade 8 strength numbers.

Each jar holds 25 bolts, and 25 each is the order minimum, so one jar is the smallest buy. Shipping weight on the jar is listed at 1,238 g. Metallics lists other sizes and quantities in the G8HC and JG8HC series on request if you need a different length or a bulk box.

No. The jar contains bolts only, 25 of them. You'll need to order 1/2-13 nuts separately, and if the joint is loaded to Grade 8 capacity, pair them with hardened washers so the bolt head and nut don't pull into softer steel or wood. A Grade 8 bolt against a soft washer loses the benefit of the higher rating.

At 1-1/2 inches of length under the head, you have room for roughly an inch of clamped material once you allow for a nut and two washers and enough thread engagement. That covers two layers of strut, angle, or channel plus hardware. For thicker stacks, built-up steel, or anywhere you're going through a beam flange, step up to a longer length in the same G8HC and JG8HC series rather than running the nut out to the last thread.

It's a plain hex head, so a standard open-end, box, or six-point socket works. A 1/2-13 hex cap screw takes a 3/4 inch wrench across the flats. No driver bit or recess to worry about, which is why these are the usual choice where you need real torque on the fastener.

Medium carbon steel in the AISI 1021 to 1045 range, quenched and tempered to reach Grade 8 properties. That heat treatment is what gets it to Rockwell C33-39 hardness. These are commonly used in automotive and fleet work where Grade 5 isn't enough, and Metallics also lists them for electrical, plumbing, and HVAC field use.