3/16" Black Phosphate Steel Rectangular Push Nuts PSHNT-007 (30 pcs.)

Diameter: 3/16"
Material: Steel
Finish: Black Phosphate
Shape: Rectangular
Style: Retainer
Type: Push Nut

Box of 30.

Instead of threads a push nut uses flanges facing inward acting as teeth to hold it in place. It can be pushed or lightly tapped into place and requires cutting to remove.