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#5 x 7/16" zinc-plated pan head framing screws - $140 (Ronkonkoma)
856 Johnson Ave
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Installation: Self-drilling #3 point penetrates up to 0.090" steel; drive with #2 Phillips bit (torque ~15–25 in-lbs). Pan head seats flush without dimpling; no pre-drill needed for thin metal.
Material & Durability: Carbon steel with zinc plating (ASTM B633) for corrosion resistance (up to 500 hrs. salt spray); indoor/dry use. Sharp wings reduce cam-out.
Compatibility: Light-gauge steel (20–25-gauge tracks/studs); #5 diameter (0.125") fits metal-to-metal/wood. 7/16" length for thin profiles; not for heavy structural (use #8–#10).