Metallics JMBHC1030PL Bolt M10 x 30 HXBT 10.9 Pln-St (Jar 100)

It's an M10 x 30 mm hex head cap screw in property class 10.9 steel with a plain (uncoated) finish. M10 is the thread diameter and 30 mm is the shank length under the head. Class 10.9 is a high-strength alloy steel class, so it's used where a lower class 8.8 fastener won't carry the load.

No. Plain steel with no plating or coating will rust once it's exposed to moisture, so keep the JMBHC1030PL to dry interior work or assemblies that get painted or sealed after install. For wet locations, outdoor structural supports, or anything in a corrosive environment, specify a zinc-plated, hot-dip galvanized, or stainless fastener instead.

Standard M10 coarse thread is 1.5 mm pitch, so it mates with any M10 x 1.5 nut or tapped hole. Pair it with a class 10 nut (or higher) so the nut matches the bolt's strength, and use hardened washers under the head and nut if you're torquing it near capacity. The JMBHC1030PL is a metric fastener, so inch-series nuts and taps will not thread onto it.

100 pieces, packaged in a jar rather than a loose box, which is how Metallics ships its shop-stock fastener counts. One jar covers a single bolt size only, so if a job needs multiple lengths you order a jar per length.

Only if the drawing or equipment spec allows it. Class 10.9 is a higher-strength class than 8.8, so going down reduces the joint's proof load and tightening torque capacity. Going the other way, a 10.9 bolt in place of a specified 8.8 is usually acceptable mechanically but it's less ductile, so check the spec where that matters. Equipment makers that call out 10.9 on motor mounts, machine bases, and support steel generally mean it.

Metallics catalogs the JMBHC1030PL with its electrical fastener line, and that's where a short high-strength M10 earns its keep: bolting transformer and motor feet to pads and bases, mounting heavy enclosures and switchgear brackets to structural steel, and securing equipment frames where the manufacturer calls out a metric 10.9 fastener. The 100-piece jar suits a service truck or shop crib stocked for repeat equipment work.

Hex cap screws in the M10 x 30 size are normally threaded for their full 30 mm length, since the standard unthreaded shank length doesn't apply until longer sizes. In practice that means you can use it in a tapped hole as well as a through-bolt with a nut. If your application specifically requires an unthreaded shank bearing on the hole, order a longer partially threaded M10 instead.