TIMCO Masonry Nails Washered Zinc -All sizes, Packs of 100

Masonry Washered Nail
Hardened nail with a loose washer specifically designed for fixing thin sheet materials like plastic trunking and cable trays to masonry and concrete blocks.
Washer head for increased clamping
35° sharp point for easy penetration
Hardened carbon steel for extra strength
Bright zinc plated for internal use