Metallics JMHTB430 Bolts M4 x 30 C8.8 Hx Tap Blt St-zn (Jar 100)

It's an M4 bolt with a 0.7 mm thread pitch, right hand, which is the standard coarse metric pitch for M4. So it will thread into any M4 x 0.7 tapped hole or nut. Length is 30 mm under the head.

Fully threaded. The threads run the entire length of the shank right up to directly beneath the head, which is what makes it a tap bolt rather than a conventional hex cap screw with a plain grip length. Useful when you need maximum thread engagement in a tapped hole or when the clamped stack varies.

Yes, and that's the stated application for these. Grade 8.8 is medium carbon steel, heat treated, with 120,350 psi minimum tensile and 95,700 psi minimum yield, hardness Rockwell C23-34. That's the metric rough equivalent of an SAE Grade 5 and is the normal structural-duty class for machinery mounting. For higher clamp loads you'd move up to Class 10.9.

No. The JMHTB430 is not Buy American compliant and not ARRA compliant, and country of origin is listed as multiple. On a job with domestic sourcing requirements you'll need a domestically produced fastener instead.

Not for bearing purposes on a flat, finished surface. The hex head is formed with a washer face beneath it, which gives a clean bearing area against the joint. If you're going into soft material, oversized holes, or need vibration resistance, you'd still add a flat washer or locking hardware separately. No washers or nuts are included.

Zinc plated steel is fine for indoor and sheltered mechanical work, which is where these get used: electrical, plumbing, heating and air conditioning, plus automotive and truck repair. For continuous outdoor exposure, washdown, or coastal service, specify stainless instead; zinc plating is a sacrificial coating and will eventually rust through in standing moisture.

They come in a jar of 100 pieces, and the jar is the minimum order unit, so 100 is the smallest quantity. Jar weight is 345 g. If you need a different length, diameter, or bulk quantity, other sizes and pack quantities in the MHTB and JMHTB series are available by request.

A 7 mm socket or wrench is the standard across-flats size for a metric M4 hex head bolt. These are hex head, so a standard socket, open-end, or ratcheting wrench all work; no driver bit is involved.