National Plating Company specializes in zinc plating springs made from wire .040″ in diameter and thinner intended for use in automobiles, tractors, lawn mowers, snow blowers and other outdoor equipment. The applied material thickness is from .0001″ to .0008″ and plated parts conform to specifications from GM, Ford, Honda, and Toyota. Combinations of plating thickness, chromates, and sealers provide salt spray protection from 48 to 250 hours of salt spray exposure.
For more information on our Zinc plating process, see the table below, or contact us directly.
Highly engineered springs designed for long term use in harsh environments
Zinc Plating
.0001″ to .0008″
Trivalent Clear
Trivalent Yellow
Trivalent Black
Hexavalent Yellow
Hexavalent Black
Sealer
48 hrs to 250+ hrs
1.0″ to 9.0″
.325″ to 2.5″
.050 lb to .5 lb
Spring Wire
Automotive
Farm
Outdoor Equipment
25 pieces to 500,000+ pieces
1-3 days
ASTM B633
Ford S437 and MWSS21P17-B1
GM4344M and 4345M
Toyota TSH6524G
Honda D2003