Metallics JBLS30G Bolts 1/2 X 1-1/2 Hx Lag Blt Galv (Jar 50)

Yes. The JBLS30G is a galvanized steel lag bolt, and Metallics calls out this finish for use in corrosive environments. That covers exterior strut and hanger anchoring into wood framing, damp mechanical rooms, and coastal or chemically aggressive areas where a plain zinc-plated bolt would bloom rust.

Six threads per inch, right-hand, and they're spaced lag threads on a full-bodied shank with a gimlet point. That's a wood thread, not a machine thread, so a standard 1/2-13 nut will not run on it. Use it as a lag into wood framing or into a lead or plastic shield in masonry, not as a through-bolt with a nut.

The head measures 0.725 to 0.750 inch across the flats, so a 3/4 inch socket or wrench is the fit. It's a hex head, so an impact wrench with a 3/4 inch socket is the usual way these get driven.

At 1-1/2 inches overall length the JBLS30G gives you a short embedment, so it suits fastening thin material (strut channel, hanger straps, box brackets, clamp backs) directly against solid wood framing. If your mounting hardware is thick or you're going through sheathing or furring before you reach structure, step up to a longer lag so you keep adequate thread in the wood. Metallics offers other lengths in the BLS and JBLS series on request.

60,000 psi minimum tensile, with a hardness of Rockwell B70 to B100, made from AISI 1006 to 1022 low carbon steel. That's a standard commercial-grade lag, fine for conduit and equipment hanging loads; it is not a high-strength Grade 5 or Grade 8 fastener, so don't substitute it where a drawing calls out a graded structural bolt.

It's manufactured to ASME B18.2.1-1996 for dimensions, with material per AISI 1006 to 1022. That's the data an MRO or institutional buyer needs for a submittal on a hex lag screw. Note for federally funded work: Metallics lists the JBLS30G as not Buy American compliant and not ARRA compliant, with multiple countries of origin.

Hot-dip galvanized is the finish normally specified for contact with pressure treated wood, and the JBLS30G is galvanized steel, which is why Metallics rates it for corrosive environments. Do not pair it with a plain-plated or bare steel washer or strap, since dissimilar uncoated steel in treated lumber will corrode first and undo the benefit.

These ship in a jar of 50, and 50 each is the order minimum. The jar is the practical difference between the JBLS and BLS lines in this Metallics series, and it's why service vans and shop benches tend to stock the jar version. Total packed weight is 4237 g.

Metallics lists these for the electrical, plumbing, heating and air conditioning industries. In practice that means hanging strut, pipe clamps, conduit straps, unit heaters, and equipment brackets onto wood structure, which is also why they're stocked in a 50-count jar rather than bulk boxes.