See all Roofing Fasteners & Accessories 0.500" - No washer - 1-1/2"
#12 Impax™ SD5 Metal Self-Drill Screw, HWH | SD5-12
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3 variants
#12-24 Impax SD5 Metal to Metal Fastener
1/4" Type B Metal Self-Tapping Screw, HH, 304 Stainless | TB-S3-14
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1 variants
1/4-14 Metal Type B 304SS Self-tapping to Metal Fastener