4 Prong T Nut 5/16"-18 x 3/8" (Tee Nut) Qty: 100 Zinc Plated Steel / Zinc Plated 4 Prongs 5/16"-18 Thread Pitch. For use with 5/16"-18 Threaded Bolts. Overall Length 3/8" All Items Are New, Packaged To Your Order Quantity From Bulk Boxes.