15. Four questions to help determine the proper fastener: 1. What materials are being fastened? 2. What are the load requirements? 3. What are the service requirements? 4. What is the environment? Fasteners/Screws
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17. Allow at least 3 threads to extend beyond all materials. (Screw will be at least 1/2” – 1” longer than attachment length.) Attachment thickness + ½” # 1 What materials are being fastened?
24. Description : #12-14 x 1-1/4” DP2 Self-Drilling Screw. 5/16” Hex Washer Head. Undercut with EPDM Sealing Washer. Carbon Steel. Zinc Plated with 1,000hrs salt spray coating. Fastener/Screw Terminology Head Style Major Diameter Threads Per Inch Fastener Length Point Type #12 - 14 x 1-1/4” DP2 5/16” HWH Major Diameter Threads Per Inch Fastener Length Point Type Head Style
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26. Hex Head Pan Flat Wafer Hex Washer Flat Cuntersunk Head and drive systems for a variety of conditions Pancake Fastener/Screw Head Styles
27. Point Type Drilling Thickness DP1 Thin (.018” - .090”) DP2 Thin Medium (.035” - .140”) DP3 Medium (.090” - .250”) DP4 Medium/Heavy (.145” - .375”) DP5 Heavy (.250” - .500”) A - DP1 Light Gauge (Thin Metal) B - DP5 Heavy Gauge The thicker the material to be fastened, the larger the point “Type”. Self Driller Point Types B A
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32. 1/8” Pop Rivet Pop rivets are used to hold two pieces of sheet metal together, common at flashing laps, using a 2-Step method; Step #1 - 1/8” Hole is Drilled Through both Pieces. Step #2 - Insert Pop Rivet in Hole with Rivet Gun
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34. Thermal Expansion & Contraction Definition: The natural characteristic of a length of metal to expand or contract relevant to a change in the metals temperature. Heat and sun expands/Cooling and shade contracts.