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Triangle Fastener Screw Gains FM Approval For Use With Exterior Wall Systems


Pittsburgh, PA – Triangle Fastener Corporation (TFC) has announced FM Approval for their ¼-14 DP3 CONCEALOR Pancake Head Screw for wall fastening, per FM Approval Standard 4881 – Class 1 Exterior Wall Systems.

TFC developed the ¼-4 DP3 CONCEALOR Pancake Head screw specifically to attach insulated metal panels (IMPs). Features and benefits include:

An unthreaded section to eliminate the potential for jacking of the insulated panel during face fastening.

A #3 square recess drive that provides stability during installation.

A large-diameter pancake head that increases pullover strength compared to smaller-diameter heads.

A TRI-SEAL coating for superior corrosion protection.

More information about the screws can be found on the TFC website at

About Triangle Fastener Corporation


From 23 locations in 15 states, TFC supplies a full line of fasteners, tools, sealants and accessories for steel framing, metal building, metal roofing and flat roofing applications. Jobsite and technical support, product development and product recommendations are available at all locations. Custom design of specialty fasteners is possible, and independent test data can be provided to confirm load capacities. To learn more visit

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