Satco

Key Features and Benefits of This Locknut

A steel construction gives this locknut the strength to hold a fixture stem securely in place over time, which matters for hanging or ceiling mounted fixtures that carry ongoing weight and vibration. Its threaded design allows it to be tightened by hand or with basic tools.

Where to Use the 90-017 Locknut

This locknut is used inside light fixtures, at junction boxes, or wherever a threaded nipple needs to be locked in place. It is a component part meant for use during fixture installation or repair rather than a visible finished piece.

Installation and Compatibility Checks

Confirm the locknut's thread size matches the nipple or stem being secured before use, since locknuts are sized to specific standard threads. It threads on by hand and is tightened to hold the connected parts in place without requiring electrical wiring itself.

Additional Buying Context

This locknut is a low cost replacement part commonly kept on hand by electricians and fixture installers for repairs or custom fixture assembly. A specification sheet is available from Satco confirming thread size for buyers who need an exact match.