How to find the right Pipe Locknuts AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Pipe Locknuts
- Trade size
- Match the locknut's trade size to the fitting's trade size (for example 1/2 in trade size), not to a measured diameter. Trade sizes are nominal, so a 1/2 in conduit locknut is much larger than half an inch across.
- Grounding and bonding
- Where the electrical code requires bonding, such as concentric or eccentric knockouts, use grounding locknuts or bonding bushings instead of plain locknuts. Plain locknuts over partially removed knockouts may not provide a reliable ground path.
- Material
- Steel locknuts for most electrical work. Plastic or sealed locknuts for tank and wet fittings. Steel bites into the enclosure for bonding. Plastic avoids corrosion in wet service.
- Sealing
- Use a sealing locknut or gasket where the box or tank must stay watertight. A standard locknut does not seal against water entry.
Brands that matter
- Halex: Conduit fittings and locknuts for electrical work.
- Bridgeport Fittings: Electrical fittings maker, including grounding hardware.
- Arlington Industries: Electrical fittings and box hardware.
- Sigma Electric: Conduit fittings and locknuts.
What to avoid
- Sizing by measuring the thread OD instead of trade size
- Plain locknuts where bonding is required
- Die-cast locknuts that crack when tightened hard
Questions
Do I need one locknut or two?
A connector usually needs one locknut inside the box. Some installations use locknuts on both sides of the wall to clamp a threaded fitting or conduit. Follow the fitting maker and local code.