Alpha Wire provides a wide selection of wire, cabling, and associated products for use with your equipment, including heat shrink tubing. Among those heat shrink options are their FIT-321 Series. We’ve had some confusion from customers who order this product and receive product marked with a “BK062” suffix, and whether this is the same material. Is it?
In most cases, this is a case of an incomplete series number versus a complete, orderable number. Someone ordering “F3211/8” is using an incomplete part number. The ‘BK’ in this case calls out black coloration, while the “062” is an Alpha packaging code with no impact on the product’s specifications. it is, however, part of the orderable number and thus will appear on the packaging and shipping information. This is normal and expected.