Metallics JMHTB12501 Bolts M12 x 50 C10.9 Hx Tap Blt St-zn (Jar 50)

Yes. The JMHTB12501 is a hex tap bolt, meaning the thread runs the full 50mm length right up to directly beneath the head, with a washer face under the head. That full thread is what you want when you are bolting into a tapped hole or a nut close to the surface and cannot afford an unthreaded grip length.

The pitch is 1.75mm, which is standard coarse M12, so it mates with any standard M12 x 1.75 nut or tapped hole. Threads are right hand. If your hole is tapped M12 x 1.25 or 1.5 fine thread, this bolt will not engage.

Class 10.9 is the step up from 8.8 and is specified where the joint needs more tensile capacity than an 8.8 fastener can deliver, which is why these are common in automotive and fleet work. The JMHTB12501 is rated 150,800 psi minimum tensile and 136,300 psi minimum yield, hardness Rockwell C32-39, from heat-treated alloy steel. For general bracket, strut, and light structural anchoring an 8.8 is usually enough; go 10.9 when the drawing calls it out or the joint is highly loaded.

These are alloy steel bolts with a zinc finish. Zinc plating handles indoor and sheltered conditions and resists handling corrosion, but it is a sacrificial coating, not stainless. For continuous outdoor exposure, washdown areas, or anything coastal, specify a hot dip galvanized or stainless fastener instead, keeping in mind stainless will not give you 10.9 strength.

Each jar holds 50 bolts, and 50 count is the order minimum, so you buy by the jar rather than the piece. The jar itself weighs 2,708 g. Jar packaging suits a service truck or a shop bench where you are pulling a handful at a time.

Yes. The MHTB and JMHTB series runs other sizes and quantities by request, so if 50mm is too short or too long for your grip, or you need bulk rather than a 50 piece jar, the same class 10.9 zinc plated hex tap bolt can be sourced in other sizes. Specify diameter, length, and pack quantity when you ask.

The JMHTB12501 carries a Buy American compliant flag and an ARRA compliant flag in its product record, with country of origin China. On federally funded work, confirm which standard your contract cites, since Buy American rules differ between domestic content and trade agreement provisions.

Use a socket sized to the hex head width, which the spec sheet gives as 18.67 to 19. On a standard metric M12 hex head that is an 18mm or 19mm socket, so carry both if you are working off a truck. The full thread means you may also want a deep socket if the bolt is long in the joint.