frictional fit restricting movement of the screw when it is subjected to vibration

1 1/4-7 Nylon Insert Locknut Zinc Plated

23/32 x 6 Reduced Shank Drill Bit (1/2 Shank)

3/4 x 18 Hex Lag Screw Hot Dipped Galvanized

which means you can place them close to each other without having to worry about compromising structural integrity

3/8-16 x 4 Hex Sleeve Anchor Zinc Plated (50) 5/8-11 Socket Cap Screws 316 Stainless Steel frictional fit restricting movement of3 8 16 x 4 Hex Sleeve Anchor Zinc Plated (50) . SLEEVE ALL sleeve anchors are pre assembled expanding sleeve anchors for use in all types of solid base materials. Download Simpson SLEEVE ALL Sleeve Anchor Technical Data