Metallics JMHTB6201 Bolts M6 X 20 C10.9 Hx Tap Blt St-zn (Jar 100)

Yes. The JMHTB6201 is a tap bolt, meaning the thread runs the full 20mm length right up to directly beneath the hex head, so there is no unthreaded shank. That matters when you are tapping into a threaded hole or a strut channel nut and need thread engagement at every depth. The head also carries a washer face underneath it.

Class 10.9 is a high alloy, heat treated grade with 150,800 psi minimum tensile and 136,300 psi minimum yield, hardness Rockwell C32-39. It is specified where an 8.8 fastener will not carry the load, which in practice is automotive and fleet work and high-load mechanical mounting. For ordinary electrical strut, hanger and equipment mounting, a lower grade is usually sufficient, so step up to 10.9 only when the drawing or the OEM calls for it.

No. The M6 x 20 class 10.9 hex tap bolt is flagged not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. On federally funded or Buy America specified work you will need a domestically sourced bolt instead.

The bolt is steel with a zinc finish, which is a plating for indoor and protected use. It resists handling corrosion and dry interior environments; it is not a stainless or hot dip galvanized fastener, so for exterior, roof-mounted condensing units or anywhere exposed to standing water and chlorides, specify a stainless or galvanized bolt instead.

They ship as a jar of 100 pieces, and 100 in the jar is the order minimum, so the jar is the smallest sellable unit. Total packed weight is 635 g. Metallics lists other sizes and quantities as available by request if 100 of this size is not what your job needs.

The head measures 10mm across the flats, so a 10mm socket or wrench drives it. Head height runs 3.85 to 4.15mm, which is worth knowing if you are bolting into a tight channel or under a bracket with limited head clearance.

Metallics lists the MHTB and JMHTB series for electrical, plumbing, heating and air conditioning work, so it is a mechanical-trade bolt for equipment mounting, hangers and strut assemblies, as well as the automotive and fleet repairs that drive the class 10.9 strength requirement. Maintenance departments standardizing a fastener crib tend to buy it by the jar in common metric sizes.