Best Concrete Anchor Bolt Washer

CONFAST 5/8\ Lag Shield Anchor Long (25 per Box)

READILY ACCEPTS MACHINE BOLTS-Any coarse threaded bolt can be used.
INTERNAL THREADS-Bolt can be removed easily.
BOLT EXPANDS ANCHOR-No need for setting tools.
CAN BE INSTALLED IN CONCRETE, BRICK OR BLOCK-Versatile anchor for most masonry applications.

Expansion shield anchor provides a secure hold in most materials including solid masonry and uncracked concrete, even in applications where the anchor will be exposed to side pressure or vibration.
Anchor is made of rust-resistant zamac alloy and consists of cone on each side that expands the surrounding sleeve when a threaded machine bolt is inserted, gripping the mounting material and holding the anchor in place.
Meets Fed. Spec. GSA FFS-325 Group II Type 2 Class 2 Style 2 specifications.
Ultimate tensile strength is 1,190 lb. in 2,000-psi concrete.
Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations).

Adequate Quantity: there are 50 pieces of concrete anchors, suitable for large volume work, meeting your daily needs, and can also be shared with your family and friends.
Pocket Size: each of concrete screws and anchors is about 3/8" x 3", and weighs only 1.3 ounce/ 37 g, fine workmanship, and easy to carry around, providing you with much convenience.
Quality and Sturdy Material: hex concrete anchors are made of carbon steel, with galvanized surface to resist rust, and feature higher hardness, hard and not easy to deform, especially practical for dry environment.
Novel Design: featuring low torque threads, masonry screws have deep and clear threads, which can make concrete penetration easily, and also simple to install.
The anchor has a finished hex washer head with anti rotation serrations to keep the anchor away from backing out.
Wide Range of Applications: hex head concrete screw anchor is mainly designed for concrete, masonry, brick or block.
Note that using a standard drill bit for installation, the drill bit size is the same as the anchor diameter.

Toggle anchor installs behind 3/8"- to 2-1/2"-thick hollow materials including gypsum board, drywall, and concrete block to provide a secure hold from within the mounting material.
Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes.
Made in USA, and works with 1/2"-13 UNC-threaded metal bolts (sold separately).
Ultimate tensile strength is 275 lb. in 1/2" drywall with a 1/2"-13 UNC bolt, and 2,038 lb. (material failure) in concrete block with a 1/2"-13 UNC hardened bolt.
Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations).

The seatpost clamp should match the diameter of the seat tube on your frame and not the diameter of the seatpost itself..
The M5 bolt includes spherical washer and mates with a cylindrical anchor barrel. This means that threads are always perfectly aligned, preventing binding and ensuring consistent clamping force..
Lightweight 6061 T6 aluminum, M5 stainless steel bolt with integrated washer.

Toggle anchor installs behind 3/8"- to 3-5/8"-thick hollow materials including gypsum board, drywall, and concrete block to provide a secure hold from within the mounting material.
Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes.
Made in USA, and works with 3/16"-24 UNC-threaded metal bolts (sold separately).
Ultimate tensile strength is 238 lb. in 1/2" drywall and 802 lb. in concrete block with a 3/16"-24 UNC bolt.
Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations).

Toggle anchor installs behind 3/8"- to 3-5/8"-thick hollow materials including gypsum board, drywall, and concrete block to provide a secure hold from within the mounting material.
Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes.
Made in USA, and works with 1/4"-20 UNC-threaded metal bolts (sold separately).
Ultimate tensile strength is 265 lb. in 1/2" drywall and 1,080 lb. in concrete block with a 1/4"-20 UNC bolt.
Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations).

Toggle anchor installs behind 3/8"- to 3-5/8"-thick hollow materials including gypsum board, drywall, and concrete block to provide a secure hold from within the mounting material.
Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes.
Made in USA, and works with 3/16"-24 UNC-threaded metal bolts (sold separately).
Ultimate tensile strength is 238 lb. in 1/2" drywall and 802 lb. in concrete block with a 3/16"-24 UNC bolt.
Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations).