A153 Thickness or Weight of Zinc Coating
| Class | Description | Minimum Average Coating Thickness, mils | Minimum Coating Thickness, Any Individual Specimen, mils |
|---|---|---|---|
| Class A | Castings, Malleable Iron, Steel | 3.4 | 3.1 |
| Class B | Rolled, pressed, forged articles except those covered by Classes C and D | See below B-1 through B-3 | See below B-1 through B-3 |
| Class B-1 | 3/16" and over in thickness and over 15" in length | 3.4 | 3.1 |
| Class B-2 | Under 3/16" in thickness and over 15" in length | 2.6 | 2.1 |
| Class B-3 | Any thickness and under 15" in length | 2.2 | 1.9 |
| Class C | Fasteners over 3/8" in diameter and similar articles, washers 3/16" to 1/4" thick | 2.1 | 1.7 |
| Class D | Fasteners 3/8" and under in diameter, rivets, nails and similar articles. Washers under 3/16" thick | 1.7 | 1.4 |