We used to carry both the N-013-938-3 screw for the tail light lens, and the N-038-107-1 screw for the front turn signal lens, but that just didn't make sense as these stainless steel screws are functionally identical.
• Front turn signal lens: Two screws per lens.
• Rear turn signal lens: Four screws per lens
Also used in Vanagon rear heater application. See schematic tab.