Metallics JSBH704 Bolts 1/2-20 x 3 HXBT SS (Jar 50)

Fine thread. The JSBH704 is a 1/2-20 bolt, 20 threads per inch, so it takes a 1/2-20 fine nut, not the more common 1/2-13 coarse. The shank measures 0.4930 to 0.5000 inch outside diameter and the bolt is 3 inches long. If the nut or tapped hole on your assembly is 1/2-13, this bolt will not thread into it.

Across the flats the hex head measures 0.736 to 0.750 inch, which is a 3/4 inch wrench or socket. Corner to corner the head runs 0.840 to 0.866 inch, so allow that much clearance in a counterbore or tight pocket.

18-8 stainless is an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. It is not a blanket answer for aggressive chemistry: some chemical environments call for special corrosion resistant materials and added precautions, and 316 stainless is the usual step up in that situation.

The JSBH704 runs 100,000 to 150,000 psi minimum tensile with 65,000 psi minimum yield and a hardness of Rockwell B95 to C32. That puts it in the range of a Grade 5 bolt on tensile but below an alloy Grade 8 fastener, so where a drawing calls out Grade 8 or a high-preload structural connection, stainless is a substitution to clear with the engineer rather than a drop-in.

They ship in a jar of 50 pieces, and 50 each is the order minimum. It is a shop or service-truck pack rather than a bulk box, which suits MRO stock and small electrical or equipment jobs. The jar weighs about 4,450 g.

Metallics lists the JSBH704 as both Buy American compliant and ARRA compliant. Country of origin is recorded as multiple, which is normal for a fastener line produced across more than one plant, so if your submittal package needs a single named origin, request documentation against the lot you receive.

The jar contains the hex bolts only, 50 of them. Nuts and washers are separate line items, and the nut has to be 1/2-20 fine thread to match. For a stainless joint, pair them with 18-8 nuts and washers so you are not mixing a plated steel nut against a stainless bolt in a wet location.

The JSBH704 itself is fixed at 3 inches long with a hex head. Metallics' SBHC and JSBHC hex bolt series covers other sizes and quantities, available by request, so if you need a shorter or longer 1/2-20 stainless bolt or a larger pack than the 50-piece jar, it can be sourced from the same series.

JSBH704 is the Metallics number, described in the catalog as Bolts 1/2-20 x 3 HXBT SS, Jar 50, from the SBHC and JSBHC hex bolt series. The J prefix is the jar-packed version of the line.