1/2" Rubber Plug – Line Sealing Stopper for 1/2" Holes, Pipes & Drains
1/2" Rubber Plug – Line Sealing Stopper for 1/2" Holes, Pipes & Drains is backordered and will ship as soon as it is back in stock.
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Description
Description
This 1/2 inch rubber plug seals a 1/2" diameter hole, pipe end, or drain opening with a simple push fit. The tapered solid-rubber stem (1" long x 1/2" diameter) compresses into the opening and holds by friction — no threads, no adhesive, no tools — making it the fast fix for plugging holes in tanks, lines, panels, and fixtures.
Common Uses
Capping open 1/2" pipe and tube ends, sealing drilled holes in tanks and sinks, temporary 1/2" drain plug for testing and winterizing, blocking lines during pressure tests, masking holes during painting or powder coating, and sealing unused mounting holes in equipment.
Sizing
Measure the hole or pipe inside diameter — this plug fits 1/2" openings snugly. Other diameters from 11/32" to 19/32" and beyond are in the rubber hole plugs & stoppers collection, with sizing help in the rubber plug size guide. For lined pass-through holes (wire protection), use a rubber grommet instead. Plumbers and maintenance teams: bulk pricing available.
How to Size a Line Plug
How to Size a Line Plug
Match the stem diameter to the inside diameter of the line, tube, or hole being sealed. The tapered ribs compress for a leak-resistant fit. For fuel or chemical service, contact us to confirm material compatibility.
Delivery and Shipping
Delivery and Shipping
Usually ships within 24 hours from our South Carolina warehouse. All orders include tracking.
1/2" Rubber Plug – Line Sealing Stopper for 1/2" Holes, P...
Line Plug Specifications
| Stem Diameter | 1/2" (12.7 mm) |
|---|---|
| Shape | Round (tapered) |
| Material | Rubber |
| Finish / Color | Black |
| Pack Quantity | 1 |
| Fits | 1/2" inside-diameter holes, tubes, and lines |
| Applications | HVAC, chemical tubing, fuel lines, boat drain plugs, pipe capping, pressure testing, winterizing, hole masking |
Stem diameter = the hole or line ID being sealed.
Fraction ↔ Decimal ↔ Millimeter Converter
Type a measurement in any format — fraction (3/8), decimal inches (0.375), or millimeters (9.5mm) — and get all three, plus the nearest standard hardware fraction.
Frequently Asked Questions
How do I size a line plug?
Match the stem diameter to the inside diameter of the line, tube, or hole being sealed. The tapered ribs compress for a leak-resistant fit.
Are these fuel safe?
They handle water and general shop fluids well. For continuous fuel or chemical service, contact us to confirm material compatibility first.
Are they reusable?
Yes - pull them out and reuse. The ribs keep sealing through many insert/remove cycles.
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