Acorn SW-MW1G250 Metal Building Screw, 9" x 1" Driveway depending on porosity

depending on porosity

Used to offset double wall stove pipe toward insulated chimney in a through-the-wall installation

NOM Certified

Minimum sump diameter: 10"

Blackboard

Acorn SW-MW1G250 Metal Building Screw, 9" x 1" Driveway depending on porosity"Acorn" Metal Building Screw #9 Gauge. 1 4" H Hex type head with Hi Lo type thread Type 17 extra sharp point increases penetration of the metal virtually eliminating the tip of the screw walking across the metal 1 2" neoprene sealing washer provides a moisture resistant barrier when properly installed Plated with top quality dacromate, for corrosion resistance Legth size : 1" Count : 250 Color : Gray WARNING: This product can expose you to chemicals