9 x 2 1/2 Six-Lobe (Torx) Flat Nibs Deck Screw Type 17 2/3 Thread Zinc Bake 1,000HR Salt Spray M18-2.5 Internal tooth lock washers are

Internal tooth lock washers are designed to prevent nuts and bolts from loosening due to vibration

These 7/8-9 x 4 1/4 Heavy Hex Structural Bolts are designed for heavy-duty construction projects

this washer creates a spring-like action that securely locks the nut or bolt in place

Their precision manufacturing ensures a snug fit with 1/4" machine screws

9 x 2 1/2 Six-Lobe (Torx) Flat Nibs Deck Screw Type 17 2/3 Thread Zinc Bake 1,000HR Salt Spray M18-2.5 Internal tooth lock washers areThese 9 x 2 1 2 Six Lobe (Torx) Flat Nibs Deck Screws are designed for superior holding power and durability in outdoor applications. Made from high quality steel, they feature a six lobe drive for easy installation and a flat nibs design that countersinks cleanly into wood. The Type 17 2 3 thread provides excellent grip, while the zinc bake finish offers 1,000 hours of salt spray protection, making them ideal for use in coastal areas or other harsh