What is the diameter of No.20 gage wire?

What is the diameter of No.20 gage wire?

• A. 0.0348 inch
• B. 0.0200 inch
• C. 0.0500 inch
• D. 0.0100 inch

Answer: (A)

Gauge sizing assigns a specific thickness to each wire size, and higher numbers mean a thinner wire. For No.20 gauge wire, the standard diameter is 0.0348 inch, which is about 0.88 millimeters. This size sits in a practical middle ground for plastering lath, offering enough stiffness while remaining workable. When you’re selecting wire, you’re matching the material’s strength and handling to a fixed table value, so 0.0348 inch is the exact diameter that corresponds to No.20 gauge.

Gauge sizing assigns a specific thickness to each wire size, and higher numbers mean a thinner wire. For No.20 gauge wire, the standard diameter is 0.0348 inch, which is about 0.88 millimeters. This size sits in a practical middle ground for plastering lath, offering enough stiffness while remaining workable. When you’re selecting wire, you’re matching the material’s strength and handling to a fixed table value, so 0.0348 inch is the exact diameter that corresponds to No.20 gauge.