Sleeve-TITE HSA3813 Sleeve Anchor, Carbon Steel, Zinc Plated Finish, Hex Head, Meets GSA FFS-325 Group II Type 3 Class 3, 3/8" Diameter, 1-7/8" Length, 5/16"-18 Threads (Pack Of 50)

WRITING REVIEW AFTER 3 MONTH ASSESSMENTWell made. Very heavy and tough construction. Bolt dimensions are exact.Used to anchor semi loading dock bumpers to our 4 loading bays to handle daily pickups and drop offs. 3 months later they are holding like the first day installed.

Great concrete anchors- work well in hollow concrete as well if you make sure that you have the correct min length for the wall thickness. Easy to install. Hope they will hold up well to the elements in Northern climates.

These are so useful for hanging things on a cindetblock wall. Only thing that'll hold.

Strong and handy. Nice fasteners.

Arrived as expected. Good product.

Perfect. Good quality!