Description
The NATIONAL MFG/SPECTRUM BRANDS HHI N301-556 is a 16-gauge cold rolled plain steel sheet measuring 18 x 6 inches, designed for general-purpose commercial and industrial applications. The sheet is produced to ASTM Specification A366, ensuring consistent material quality and dimensional accuracy. Its matte finish accepts paint and plating without additional surface prep. The cold rolled process delivers a smooth, uniform surface that is easily formed and welded, making it a reliable stock material for fabrication, repair, and fit-out work across trades.
This sheet metal is suited for commercial and industrial settings where a versatile, workable steel stock is required. Typical applications include HVAC ductwork patches, electrical enclosure fabrication, structural supports, brackets, and general sheet metal repair. The 18 x 6 inch size makes it manageable for single-technician use on site or in a shop environment. Each package contains 3 pieces.
Key Features
- 16-gauge cold rolled plain steel construction for consistent thickness and surface quality
- Dimensions: 18 x 6 inches per sheet
- Meets ASTM Specification A366 for general-purpose commercial quality steel
- Matte finish suitable for painting or plating without additional surface treatment
- Easily formed and welded for fabrication and repair applications
- Package quantity of 3 sheets per unit
Compatibility
Designed as a general-purpose sheet metal stock for commercial and industrial fabrication, repair, and fit-out applications across HVAC, plumbing, electrical, and structural trades.
Installation Notes
Sheet metal work should be performed by qualified tradespeople using appropriate cutting, forming, and welding equipment. Wear cut-resistant gloves and eye protection when cutting or shaping sheet metal. When welding, follow applicable safety and ventilation requirements per local codes. Deburr all cut edges before installation to prevent injury and ensure proper fit.
Technical Specifications
- Dimensions: 18 x 6 inches
- Gauge: 16
- Material: Cold Rolled Plain Steel
- Finish: Matte
- Standard: ASTM Specification A366
- Package Quantity: 3 pieces
- Weight: 5 pounds
Standard Information
- Brand: NATIONAL MFG/SPECTRUM BRANDS HHI
- Manufacturer Part Number: N301-556









