1/4"-20 x 9/16" Zinc Plated Steel Coarse Thread Pronged Tee Nuts (12 pcs.)

Diameter: 1/4"
Length: 9/16"
Material: Steel
Finish: Zinc
Drill Size: 5/16"
Thread Size: 20 (Coarse)
Shape: Round
Style: Long Pronged
Type: Tee Nut
Prongs: 3

Box of 12.

Tee nuts are generally used in soft wood to provide a stronger surface for a screw or bolt to mount into.