Metallics JMHTB812SS Bolts M8 x 12mm CA-2 Hx Tap Blt SS (Jar 100)

It's an M8 bolt, 12mm long, with a 1.25mm thread pitch and right-hand threads. That's the coarse metric pitch for M8, so it mates with standard M8 tapped holes and M8 coarse nuts. Being a tap bolt, the thread runs the full length of the shank right up under the head, which matters when you're threading into a shallow tapped hole in a motor foot or bracket.

Material is 18-8 stainless steel, grade A-2. That's the standard austenitic stainless used for general corrosion resistance, so it suits damp plant rooms, exterior equipment mounts, and wash-down environments where plated carbon steel would rust. Stainless A-2 is not a high-strength structural grade, so for load-critical bolted joints spec a graded carbon bolt instead.

No. These are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. On a federally funded or domestic-content job you'll need a domestically sourced fastener instead, so flag it before the submittal goes in.

They ship in a jar of 100, and 100 count is the order minimum, so one jar is the smallest buy. The jar packaging suits a service van or a shop bench where you're pulling a handful at a time rather than opening a bulk box. Metallics does offer other sizes and quantities in the MHTB and JMHTB tap bolt series on request.

The usual job is mounting a motor to machinery, bolting through the foot into a tapped hole. They also get used heavily in automotive and truck repair work. The hex head has a washer face underneath it, which spreads the bearing load slightly and gives a cleaner seat on a machined surface than a plain head.

A tap bolt is a hex head fastener threaded the full length of the shank, right up under the head. A standard hex cap screw has a plain unthreaded grip section below the head. Use the tap bolt when you're threading into a tapped hole and want engagement all the way through, or when the grip length would otherwise leave unthreaded shank sitting in the hole. At only 12mm long, the JMHTB812SS is a short fastener meant for thin flanges and shallow tapped holes rather than deep stack-ups.

Hardness is Rockwell C22-32, with a published yield strength of 92,800 psi minimum and tensile strength of 11,600 psi minimum. An MRO buyer standardizing fastener stock across a facility can use those numbers directly on a submittal. Note these are stainless A-2 bolts, so match them to the joint the spec calls for rather than substituting them into a graded carbon steel application.