Hole Plugs (HPN4PC Series) - Hammond Mfg.

HPN4PC series hole plugs are designed to seal unused pushbutton, conduit, and knockout holes and are constructed in polycarbonate for non-metallic applications. Hole plugs includes a neoprene/EPDM gasket and secure easily with an anti-rotational design. This series complies with Type 1, 3, 3R, 4, and 4X​.

Hillman 58146 Nickel-Plated Hole Plugs (3/4 Diameter),10 : Industrial & Scientific

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Hammond HP75PCLG IP66 Non-Metallic Hole Plug 41mm Diameter

Colony Machine #2162-300 Allen Bolt Hole Plug Assortment 1/4, 5/16, 3/8 inch - 100 Pieces Each - Chrome Plated – Lowbrow Customs

Industrial Enclosures - Hammond Mfg.

Hole Plugs (HP Series) - Hammond Mfg.

HP100PCGY Hammond Manufacturing Conduit Fittings & Accessories Hole Plug - 1 Conduit - Polycarbonate Gray datasheet, inventory, & pricing.

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Handles & Accessories - Hammond Mfg.

Hole Plugs (HPN4PC Series) - Hammond Mfg.