Metallics JMHTB6161 Bolts M6 X 16 C10.9 Hx Tap Blt St-zn (Jar 100)

Yes. The JMHTB6161 is a tap bolt, so the thread runs the full 16mm length right up to underneath the hex head. That matters when you are clamping thin material or need the thread engaged at the very top of the stack, where a partially threaded bolt would leave an unthreaded shank in the joint.

The thread is metric M6 with a 1mm pitch, right hand. That is the standard coarse M6 pitch, so any common M6 coarse nut or tapped M6 hole takes it. If the hole you are going into was tapped fine pitch, this bolt will not run in.

Class 10.9 gives you more clamp load in the same M6 size. These Metallics bolts run a minimum tensile strength of 150,800 psi and minimum yield of 136,300 psi, with a hardness of Rockwell C32-39 from heat treatment. Where an 8.8 would be marginal on tensile load, the 10.9 carries it. The tradeoff is that higher strength alloy steel is less forgiving of shock and is not a substitute for a stainless fastener in a wet or corrosive location.

The JMHTB6161 is alloy steel with a zinc finish. Zinc plating handles indoor and sheltered conditions, light moisture and handling, but it is a sacrificial coating, not a stainless or hot dip galvanized fastener. For continuous wet exposure, washdown areas, or coastal work, specify stainless or galvanized hardware instead.

These ship as a jar of 100 pieces, and the jar is the minimum order unit. Jar packaging is the practical choice for a service van or a shop bin, since you can pour out a handful without losing the rest of the count. Other sizes and quantities can be requested.

There is a washer face formed underneath the hex head, which gives a flat, finished bearing surface against the part. On steel strut, channel, or machined surfaces that is usually enough on its own. Add a separate washer when you are bolting into soft material, a slotted or oversized hole, or sheet metal that needs the load spread.

No. The JMHTB6161 is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your contract carries a domestic sourcing clause, this fastener will not clear it and you need a domestically produced bolt instead.

Both. The field application listed covers the electrical, plumbing, heating and air conditioning trades, and the high strength class 10.9 version originated in automotive and fleet work where tensile demands are higher. Typical mechanical and electrical uses are equipment mounting, panel and enclosure hardware, and anywhere an M6 tapped hole needs a full thread fastener.

Both prefixes are the same metric hex tap bolt series; the J denotes the jar pack. JMHTB6161 is the M6 x 16, class 10.9, steel with zinc plate, supplied 100 to a jar. If you need a different diameter or length from the series, ask, since other sizes and quantities are available.