Seal-Rite Metal grid / Grille clip: Discontinued 2009 - Replacement Available
Seal-Rite Rolled Metal spring tension window grid clip; fits outlook, seal rite, window technology and other wood windows. 
grille / grid slides between glass and wood stop 
metal rolled top snaps into wood grille 

Concealed spring Metal Fastener
Width: 3/8 inch wide, 
Height: 5/16 inch tall with 1/8 inch rolled edge, 
Projection: 1/4 inch 
Patent # 5109647

Sold in bags of 10 clips.

Guide: GRILLE CLIP INSTALLATION INSTRUCTIONS