21BF1311 up for sale is a new lot of 10 pieces 410 stainless roll pins , these fot 0.093 diameter but measures bigger to allow a tight fit then outer diameter measures 0.099 inch ,x 0.435 just under 7/16 inch , see photos for public specifications ,these are used on the cobra and HH-60 helicopter ,  see our store for more information like this , thank you rwk