Fastener


We recommend using ASTM F1941 when determining the proper requirements for electrodeposited coatings of zinc and cadmium on fasteners. By requiring F1941, you will decrease cost and lead time by avoiding unnecessary stress relief or hydrogen embrittlement relief requirements per B633 or B766. For information on eliminating hydrogen embrittlement per ASTM F1941, click here

ASTM F1941

Coating Designation

Fe/Zn – Zinc

Fe/Cd – Cadmium

Thickness Designation

3 – 3 um (0.0001”) Thick

5 – 5 um (.0002”) Thick

8 – 8 um (.0003”) Thick

12 – 12 um (.0005”) Thick

Appearance Designation

A – Clear Transparent – Colorless with slight iridescence

C – Yellow – Yellow iridescent

D – Opaque – Olive green, shading to brown or bronze

E – Black – Black with slight iridescence