F3125 Permitted Coatings

Bolt F2329 Hot Dip Galvanizing B695 Mechanical Galvanizing F1136 Zinc/Aluminum (Geomet) F2833 Zinc/Aluminum
A325 Approved Class 55 Grade 3 Grade 1
F1852 Not Approved Class 55 Not Approved Not Approved
A490 Not Approved Not Approved Grade 3 Grade 1
F2280 Not Approved Not Approved Not Approved Not Approved
*Other coatings may be used on 120ksi/A325 fasteners upon agreement between purchaser and user. Coatings on 150ksi/A490 fasteners must be qualified by ASTM committee F16.