Side airbag retention system and fastener

A side airbag retention system for installation in a keyhole opening (22) including a bolt with a generally conical head portion (36) and a shaft (30) disposed through an aperture (12) of the air bag retainer. A bolt retainer is disposed about the bolt shaft (30) between the bolt head (34) and an air bag retainer (10). The bolt retainer preferably includes a spring washer (50) having a pronged engagement member (62) extending generally radially therefrom between anti-rotation tabs (70,72) extending from a side thereof opposite the bolt head. A compression limiting member (54) is disposed about and protrudes from the washer opening toward the bolt head.