SMC spiral fittings are manufactured with an elbow lock seam, lap seam (i.e. stitch weld, riveted, tack weld or solid weld), standing seam or butt weld seam. These may be with or without duct sealant.

All Stamped fittings are manufactered from extra deep drawing steel (EDDS) in accordance with ASTM-A653. This type of steel is

manufactured by domestic steel mills and has some unique qualities. Stmaped fittings are precision drawn, tolerances must be within

+ or - .002 thickness to assure quality product at all times. All pressed fittings are made 0f 24 Ga. Galvanized material with a G60 or

better coating thickness and is chemically treated to retard white rust.

End Cap (Plug)

Dimensions to be listed as follows:

A, equal diameter