ConFast Lag Shield Anchors Now Available

Confast Lag Shield AnchorsConfast Lag Shield Anchors are designed for anchoring into concrete, brick, and block. Lag Screws are used to expand the Lag Shield Anchor against the concrete, brick or block.

Product Features
  • EASY TO​ ​INSTALL: Fast, secure installation
  • EASY TO​ ​REMOVE: Simply turn clockwise and then back the screw out of the hole
  • ONE PIECE DESIGN: No nuts or washers the anchor comes complete

There are numerous technical specifications that must be considered when using Lag Shield Anchors, including diameter, internal thread length, minimum embedment and required hole size. The Lag Shield Anchor is a great fastener when very hard (short) concrete or lower grade (long) concrete is a concern. The size of the anchor refers to the diameter of the lag bolt to be used with this fastener. Once all these factors have been determined, you can find the expected holding values in the technical information below.


To determine the length required, add the thickness of the material to be fastened, plus the lag shield anchor length, and then an additional half an inch. NOTE: The tip of the screw must protrude from the bottom of the lag shield anchor to ensure proper expansion.


The forces on a Lag Shield Anchor are transferred to the material in which it is installed. If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power. As a rule of thumb, the expansion anchor industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from an unsupported edge. When vibration or sudden impact is part of the load conditions, the spacing should be increased. 

Technical Information:  Ultimate Load Values in 2000 PSI Concrete

Values shown are average ultimate values and are also offered only as a guide and are not guaranteed. A safety factor of 4:1 or 25% is generally accepted as a safe working load. Reference should be made to applicable codes for the specific working ratio.  

Installation information
  • Installing a 1/4″ Lag Shield Anchor Short
  • Drill a 1/2″ hole into the concrete using a carbide-tipped bit that meets ANSI Standards B212.15.
  • The depth of the hole can be either deeper or equal to the minimum embedment depth of 1″ which is equal to the length of the anchor.
  • Clean the hole with either a wire brush, vacuum, compressed air, or a blow-out bulb.
  • Insert the anchor in the hole with the closed end of the lag shield inserted first. 
  • Place the fixture over the 1/4″ Lag Shield Anchor Short, then insert a 1/4″ diameter lag screw through the fixture and into the 1/4″ Lag Shield Anchor Short.
  • Use a wrench to turn the lag screw clockwise until tight or maximum torque value 5ft./lbs. is reached.
  • Always use proper personal protective equipment per both manufacturer’s and OSHA instructions
About Concrete Fastening Systems Inc.

Concrete Fastening Systems Inc. has been selling concrete fasteners for over 30 years from a fully stocked warehouse in Cleveland, Ohio. Free, same-day shipping in every length and diameter is available by ordering at The product delivery will happen in 1-3 days.

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