It functions as an expansion anchor in solid walls and in wooden studs

1 1/8-7 x 13 Socket Cap Screw Alloy

1 1/4-7 x 8 Socket Cap Screw Alloy

3/4-10 x 3 Hex Cap Screw SS 18-8 (A2)

1-8 x 5 Socket Cap Screw 18-8 (A2) Stainless Steel

7/8 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (350) 9/16-18 Hex Cap Screws 18-8 Stainless Steel It functions as an expansion7 8 L9 USS Tension Flatwasher Yellow Zinc Plated Domestic USA (350) . L9 High Tension USS pattern flat washers are designed for use in high stress, severe service environments. The highest mechanical strength off the shelf fastening system available, its special features control torque tension characteristics to develop high clamp loads when using properly controlled tightening methods.