Metallics JMHTB530 Bolts M5 x 30 C8.8 Hx Tap Blt St-zn (Jar 100)

Yes. The JMHTB530 is a 30mm long metric hex tap bolt with a 0.8mm thread pitch (standard M5 coarse) and a right-hand thread. Being a tap bolt, the thread runs the full length of the shank right up to directly beneath the head, so there is no unthreaded grip section. That matters when you are threading into a tapped hole of unknown depth or clamping a thin bracket, where a partially threaded bolt would bottom its shoulder before it pulled tight.

Class 8.8 is the medium carbon steel, heat-treated grade, and it is the usual choice for mounting motors to machinery and equipment frames. On the JMHTB530 that works out to 120,350 psi minimum tensile strength, 95,700 psi minimum yield, and a hardness of Rockwell C23-34. Grade 8.8 is roughly the metric counterpart of an SAE Grade 5 bolt, so it handles structural clamping loads that a plain unmarked bolt should not be asked to take.

No. The Metallics JMHTB530 hex tap bolt is not Buy American compliant and is not ARRA compliant; country of origin is listed as multiple. If your project carries Buy American or ARRA procurement language, this part will not satisfy it and you need a domestically sourced fastener instead.

The JMHTB530 has a washer face formed beneath the hex head, which gives a clean bearing surface against the part. That is not the same as a flat washer, though. If you are clamping soft material, an oversized or slotted hole, or want added bearing area to spread load, add a flat washer. Lock washers or nuts are not supplied with the jar.

Zinc plated steel is what the JMHTB530 carries, and it is intended for general indoor and sheltered service, the kind of work electrical, plumbing, heating and air conditioning trades do. Zinc plating gives moderate corrosion resistance, not marine or sustained wet exposure protection. For a rooftop unit, pool room, coastal site, or anywhere washed down regularly, specify stainless or hot dip galvanized instead.

These ship as a jar of 100 pieces, and 100 is the minimum order quantity, so the jar is the unit you buy. The filled jar weighs 517 g. Other sizes and quantities in the MHTB and JMHTB tap bolt series are available by request if 100 of the M5 x 30 is not the count you need.

A tap bolt like the JMHTB530 is fully threaded to the head, so it is meant to thread directly into a tapped hole, in a motor foot pad, a cast housing, or a machine frame. A standard hex cap screw has a plain unthreaded shank under the head and is normally run through a clearance hole into a nut. If you are bolting into threaded holes of varying depth, the fully threaded version engages whatever depth you have; if you are shearing across a joint through clearance holes, a partially threaded body in the hole is the better choice.

Yes, the M5 x 30 Class 8.8 hex tap bolt in zinc plated steel is a common automotive and truck repair fastener as well as a machinery mounting bolt. The heat treated medium carbon steel grade is what most vehicle bracketry and accessory mounting calls for in metric sizes.