Umbrella Nail
An Umbrella Nail, also known as an Umbrella Head Nail, is a special type of nail with a wide, flat head resembling an umbrella. The #2.5 indicates the size or diameter/length specification, depending on manufacturer standards. Umbrella nails are typically used to secure roofing felt, insulation boards, shingles, or thin materials to wood or other substrates. The wide head provides better holding power and prevents tearing of the material. Available specifications: #2.5