CORTEX GRAY FASTENER. MNPT x 3/4 in. Set the screw, set the plug and you're all set. All screws, plugs and setting tools are included in every box. Self Drilling: Yes. Self Tapping: Yes. Hillman 210066 Zinc Steel Coarse Thread Hex Head Cap Screw 5/16 Dia.x1-1/2 L in.
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