To certify that a batch meets , manufacturers perform the following tests:
: The "B" (bright/blue) finish provides a silver-blue, semi-lustrous look. Fit Interference : For threaded parts like long bolts, an 8 m coating can sometimes cause thread interference din 50961 fe zn 8b
) to comply with environmental regulations like RoHS, replacing the older, toxic Hexavalent ( Cr6+cap C r raised to the 6 plus power ) versions. 4. Compare with modern standards To certify that a batch meets , manufacturers