Page 7 of Concrete Fasteners Catalog by Concrete Fastening Systems

5 p 888.498.5747 f 216.391.5352 www.confast.com MACHINE SCREW ANCHOR The Machine Screw Anchor is made up of an antimonial lead alloy sleeve and a zinc alloy (Zamak 5) internally threaded cone with a series of integral ribs or lugs. The ribs prevent the cone shaped nut from turning in the sleeve. All size anchors, except the 3/4" size, are preassembled into a single, self contained unit. All units are made of 100% rust proof material. TECHNICAL INFO Approvals: Meets G.S.A. Specification FF-S-325, Group II, Type 2, Class 1. Applications: Light to medium duty into concrete, block and brick. Installation: (1) Drill hole of recommended diameter (see chart below) into the base material to a depth equal to the length of the anchor. Place the Machine Screw Anchor, base end of the conical nut first, into the hole The anchor should be flush or slightly deeper than the surface of the base material. A deeper hole should be used when making attachments to poor masonry or when additional holding power is needed. (2) Position the pilot end of the setting tool into the threaded bore of the anchor and press firmly against the lead alloy sleeve of the anchor. Using a hand hammer, strike the end of the setting tool with repeated sharp blows. Anchor is set when the sleeve cannot be further tamped or caulked down around the conical nut. (3) Position the object to be fastened over the anchor and bolt into place. The length of the screw or bolt should equal the thickness of the material being fastened, plus the additional length required to ensure that the screw engages a major portion of the internal threads of the anchor. Bolt Length: Thickness of material to be fastened plus anchor length equals bolt length. Anchor Spacing: The forces on a Machine Screw Anchor are transferred to the base material that it is installed in. If the anchors are installed too close together, it can cause an interaction of the forces, thus reducing the holding power of the anchor. As a rule of thumb, the expansion industry has established a minimum standard of ten (10) anchor diameters for spacing between anchors and five (5) anchor diameters from the edge. When vibration or sudden impact are part of the load conditions, spacing between anchors should be increased. ANCHOR SIZE ANCHOR LENGTH HOLE SIZE PULL-OUT 6000 PSI CONCRETE Values shown are average ultimate values and are 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 in applicable codes for specific working ratio. Minimum embedment for satisfactory anchor performance is 4-1/2 bolt diameters. Deeper embedments will yield higher tension and shear capacity. TECHNICAL DATA #10 5/8" 3/8" 1180 lb. 5/16" 1" 5/8" 2200 lb. 1/4" 7/8" 1/2" 1340 lb. 3/8" 1-1/4" 3/4" 2840 lb. 1/2" 1-1/2" 7/8" 3120 lb. 5/8" 1-3/4" 1-1/8" 4940 lb. 3/4" 2-1/4" 1-1/4" 5860 lb.

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