Metallics BHC87 Bolts 5/8-11 x 12 HXBT St-zn (Box 25)

The BHC87 is a 5/8-11 hex bolt, so it takes 11 threads per inch on a 5/8 inch nominal diameter. Any standard coarse-thread 5/8-11 hex nut threads onto it. The threads are made to ASME B18.2.1-1996, the dimensional standard for square and hex bolts, so it mates with off-the-shelf 5/8-11 nuts and washers.

Metallics lists the BHC87 as both Buy American compliant and ARRA compliant, which is what a government, school, or transit submittal usually asks for. Country of origin is recorded as multiple, so if your spec requires a single named country of manufacture, confirm the origin on the lot you receive.

The hex head measures 0.906 to 0.938 inch across the flats, which is the standard 15/16 inch wrench size for a 5/8 inch bolt. Head height runs 27/64 inch, so plan clearance accordingly in tight channel or strut work.

Steel with a zinc finish. Zinc plating handles indoor and sheltered damp conditions and gives moderate corrosion resistance, but for direct weather exposure, coastal air, or buried work, hot-dip galvanized or stainless is the better call.

The BHC87 ships as a box of 25 bolts, and the order minimum is 25 each, so 25 is the smallest quantity. Metallics notes other sizes and quantities are available by request if 25 is more than the job needs or you want a longer run of the same thread.

The BHC87 is a hex bolt built to ASME B18.2.1-1996, the hex bolt dimensional standard, with a 5/8-11 coarse thread. Hex bolts in that standard are normally supplied with a plain unthreaded shoulder and threads over the end portion of the shank, rather than threaded end to end. If your detail calls for threads through the full grip, specify a fully threaded tap bolt instead.

A box of 25 comes in at 27 lbs, so it is a one-hand lift but worth noting if you are staging several boxes up a lift or onto a roof. Carton footprint is listed at 8.25 x 8 x 7.25 inches.