Concave Bottom Cup-Type Expansion Plugs seal by pressure exerted by the concave bottom against the walls of the plug. They are made standard from Carbon Steel and are available in 24 sizes, ranging from 3/8" - 3" in Nominal Diameter. (Brass, Aluminum and Galvanized Steel are also available. Please contact EFC International directly for information).

Nylon insulation Plugs close cavity-fill insulation holes in wood and other types of siding. Their convex, matte finish head blends with siding, and holds securely in the hole.

Glossy Nylon Dome Plugs close unneeded chassis holes, and their smooth, glossy head provides easy glide and shiny finish. They are available in Single Chassis and Multiple Chassis designs.

Dome Plugs for Thicker Panels close unneeded panel holes and electrical knock-outs in panels up to 1/4" thick. They are available in 12 sizes for use in 1/2" to 2" (12.70mm - 50.80mm) diameter holes.

HEYCO® Double-D Strain Relief Hole Plugs close unused strain relief mounting holes or other chorded or "DD" holes where holes are punched or molded with two opposing flats.

These Thicker-Panel Glossy Nylon Dome Plugs close unneeded chassis holes and electrical knockouts. Their smooth, glossy head provides easy glide. They are available in 11 sizes for use in 1/2" - 2" (12.70mm - 50.80mm) diameter holes, in 1/4" (6.40mm) thick panels.

Liquid Tight Break-Thru Plugs come in six sizes in the standard black color. These co-molded nylon and elastomer parts provide liquid tight closure when used as a plug. When pierced, Liquid Tight Break-Thru Plugs function as a liquid tight bushing that converts raw edged holes to smooth, neat, insulated holes. They mechanically protect electrical and telecommunications cables, tubing, hoses, ropes and utility lines.

Louvered Hole Plugs permit the passage of air for ventilation but limits liquid infiltration. The plug locks firmly into a panel up to 0.250 in (6.40 mm) thick. It is suitable for ventilation in electronic enclosures, motor housings and metal or plastic panels.

Thicker Panel Nylon Vent Plugs permit the passage of air for ventilation and heat dissipation in 1/4" thick panels, and hole diameters of 1/2" to 2".

HEYCO® Pry-Out Nylon Dome Plugs are available in multiple sizes for use in 1/4" (6.4mm) to 2" (58.0mm) diameter holes for panel thicknesses up to 0.250" (6.4mm). Holds securely in chassis up to 1/4" (6.4mm) thick.

HEYCO® Short Nylon Dome Hole Plugs have limited protrusion (1/8" or 3.20 mm) inside panels.

HEYCO® Standard Nylon Dome Type Hole Plugsclose unneeded chassis holes. Their convex matte finish head tapers to a thin edge. They are available in 29 sizes for use in 3/16" - 6" (4.70mm - 152.40mm) diameter holes.

Metric Nylon Dome Plugs close unneeded chassis holes. They have a convex, matte finish head that tapers to a thin edge.

Nylon Vent Plugs permit the passage of air for ventilation and heat dissipation. They are available in sixteen sizes for use in 1/2" (12.70 mm) to 4" (101.60 mm) diameter holes.

Plate Seals protect against chafing and abrasion while sealing out fumes, heat, dust moisture and other contaminants. Used to manage and support cables, hoses, hydraulic, fuel and oil lines, as they are routed through bulkheads and openings and isolate from sharp edges. Typically mounts with screws and rivets or with adhesives, by special order. Available in standard off the shelf (COTS) and custom trim rings to fit myriad of applications.

These Recessed Plastic Plug Buttons are made from polyethylene, and are available in 8 sizes.