Metallics JMHTB14351 Bolts M14 x 35 C10.9 Hx Tap Blt St-zn (Jar 50)

It's an M14 x 35 mm hex tap bolt with a 1.25 mm thread pitch, right hand thread. The 35 mm is the overall shank length, and because it's a tap bolt the thread runs the full length right up under the head, so there's no unthreaded grip section to work around on thin material or tapped blind holes.

Class 10.9 is the higher-strength option: 150,800 psi minimum tensile and 136,300 psi minimum yield, hardness Rockwell C32-39. Metallics specifies this grade for automotive and fleet work where an 8.8 fastener doesn't give enough tensile strength. Stepping up from 8.8 to 10.9 in the same M14 x 1.25 size is the normal move when a joint keeps failing, provided the mating threads and the clamped parts can take the higher preload.

No. Metallics lists this bolt as not Buy American compliant and not ARRA compliant, with country of origin recorded as multiple. If your job carries a domestic-content requirement, this part won't satisfy it and you'll need a documented domestic fastener instead.

The bolt is high alloy steel with a zinc finish, which handles indoor and general sheltered use and gives moderate protection against incidental moisture. It is not a stainless or hot-dip galvanized fastener, so for constant salt spray, road de-icing chemicals, or submerged service you want a heavier coating or a corrosion-resistant alloy instead.

It ships as a jar of 50 pieces, and 50 each is the order minimum, so you buy the full jar rather than loose counts. Metallics lists other sizes and quantities in the MHTB and JMHTB series by request if you need a different length or a bulk pack.

The washer face is a machined bearing surface under the hex head that spreads load and gives a cleaner seat than a plain head, but it is not a substitute for a hardened washer on a class 10.9 joint. At 136,300 psi minimum yield this bolt can be preloaded hard enough to emboss or dish softer material, so a hardened washer is still the right call on aluminum, castings, or slotted holes.

Either works. A tap bolt is fully threaded, so it can thread into a tapped hole at whatever depth the hole allows or run through a clearance hole and take a nut. If you pair it with a nut, match the strength: use a class 10 nut with this class 10.9 bolt so the nut isn't the weak point in the joint.

It's a hex head with a washer face underneath, so it drives with a standard open-end wrench or a six-point socket. Metric M14 x 1.25 hex bolts of this type are conventionally a 21 mm across-flats head, which matches the head width Metallics lists for this item, so a 21 mm socket is what to have on the truck.