National Manufacturing N223-669 Anchor Shackles w/ Screw pin 1/4" Authorized Replacement for Stanley Hardware Stock #N223-669 Designed for use in marine, industrial and construction applications Galvanized finish for superior corrosion resistance Meet federal specifications RR-C-271D, Type IV, Class 2 Manufactured from forged steel Designed for use in marine, industrial and construction applications Galvanized finish for superior corrosion resistance