DEKFAST #15 Roofing Screws and NOFUM Plates

The DEKFAST #15-13 DP1 is a drill point truss head roofing screw made of carbon steel. It fastens into wood, concrete or steel from 16 ga. to 22 ga. and suits retrofit base attachment in low-slope roof assemblies with insulation and membranes. It taps up to 1/2 in thick steel with a 1/4 in drill bit.

A black epoxy coating protects the screw. The coating meets or exceeds FM4470 corrosion standards and withstands 15 cycles of the Kesternich DIN 50018 SFW 2.0 test. The head is 0.095 to 0.105 in high and 0.425 to 0.440 in in diameter. The 3 in metal stress plate is formed from 26 gauge Galvalume steel and is used with the Phillips truss head fastener. Plates are used with virtually all types of insulation board used for roofing systems.

• #15-13 DP1: 1 1/4 and 2 in long, fully threaded; 1,000 pieces per box
• #15-13 DP1: 3 in long, 2 7/8 in thread length; 1,000 pieces per box
• #15-13 DP1: 4 and 5 in long, 3 7/8 in thread length; 1,000 pieces per box
• #15-13 DP1: 6 to 12 in long, 3 7/8 in thread length; 500 pieces per box
• #15-13 DP1: 14, 16, 18, 20, 22 and 24 in long, 3 7/8 in thread length; 250 pieces per box

• Truss head, Phillips drive
• Carbon steel screw with black epoxy coating
• Stress plate: 3 in, formed from 26 gauge Galvalume steel
• Plate shapes: 3 in x 3 in square recessed Galvalume metal, 3 in x 3 in square flat bottom Galvalume metal, 3 in across flats hex Galvalume metal, 3 in across flats hex plastic, 2 in round Galvalume metal (standard), 3 in round Galvalume metal (standard), 3 in round plastic
• Drill bit for concrete: 7/32 in carbide tip
• Drill bit for steel: 1/4 in 135 degree split point
• Pre-drilling is required for steel thicker than 14 ga.
• Screw gun: 2,000 RPM maximum, with torque control
• Metal deck: the fastener penetrates the deck by at least 3/4 in
• Concrete and wood: embedment of at least 1 in, or at least 3/4 in of penetration beyond wood decking
• Strength: tensile 4,500 lb minimum, shear 2,400 lb minimum, torsional 160 lb-in minimum

• FM Approved mark printed for the screw and the stress plates
• Plate meets or exceeds Factory Mutual I-60 or I-90 wind up lift specifications on most insulation boards