8020, 3320, 15 Series, 5/16-18 x 0.687 Inch Flanged Button Head Socket Cap Screw Bolt (FBHSCS) with Slide-in Economy T-Nut Hardware Combo (25 Pack)

Includes 3330 - 5/16-18 x 0.687 11/16 inch flanged button head socket cap screw and 3278 - 5/16-18 slide-in economy t-nut offset thread. | Both the flanged button head socket cap screw and economy t-nut is made out of steel with a black zinc finish. | The bolt comes with a 0.66 inch diameter flange head and full thread length of 0.687 inch with a 3/16 allen hex drive. Thread size is 5/16-18. | The nut measures .638 x .222 x .984 inches long with an offset 5/16-18 thread. | Used to mount your brackets or plates to the track of the 15 Series or standard 1.5" based aluminum extrusion. Perfect for any DIY machinist!