- Seals or holds pressure while testing a piping system
- Zinc-plated carriage bolt resists corrosion and rust
- Hex nut makes tightening and removing easy
- Natural rubber threaded O-ring for a positive seal
- Black color blends well with cast iron pipe
- Color: Black
- Length: 2.2
- Material: Metal
- Nominal Size: 4 in
- Pressure Rating: 17 psi