To order, add up the thickness of the panels being joined together, as shown here. Next, locate the total thickness on the chart. The part number is shown under the head style (oval or flush).

5/16" Oval Head Fastener
and 1" Spacing S-Spring Receptacle

Total Material Thickness	Stud Grip	Spring Height
			5/16" Oval Head Stud Part Number	1" Spacing S-Spring Part Number