3/8 x 16 TPI x 1-1/2 (FT) UNC Coarse Hex Flange Serrated Bolt Grade 5 Bolt And Nut Catalogue Pdf 8 Pieces) 3/8-16x5/8" Grade 5 Serrated Hex Flange Bolts PEM Tooling CATALOG 3 Pieces Total Serrated Hex Flange Screws are available in steel with a zinc or black oxide finish; grade 5 with a zinc finish; and in 18-8 stainless steel. Fastener SuperStore offers over 250 distinct material and size options in our serrated hex flange screw selection, all of which can be quickly and easily located on our site Shop High Quality Grade 5 Serrated Hex Head Flange Bolts at Wholesale Prices.Available by the Piece, Package, & Bulk.No Order Minimums Diameter/Pitch: 7/16-14 | Length Under Head: 2