8020, 3330, 15 Series, 5/16-18 x 0.687 Inch 11/16 Inch Flanged Button Head So…
This flanged button head socket cap screw is made out of steel with a black zinc finish. Thread size is 5/16-18. Fastener Type: Flange. Unit Count: 250.0 Count. Thread Size: 5/16″-18. Thread Coverage: Fully Threaded.