Item:Thumb Nut; Nut Style:Round Knurled Thumb Nut; System Of Measurement:Inch; Basic Material:Stainless Steel; Material Grade:18-8; Fastener Finish:Passivated; Fastener Thread Direction:Right Hand; Dia./Thread Size:#4-40; Fastener Thread Type:Unc (Coarse); Nut Height:1/4 In; Fastener Thread Length:0.25 In; Head Height:1/8 In; Head Dia.:5/16 In; Base Height:1/8 In; Base Dia.:1/4 In; Nut Standards:Astm 581/582;-Office Products-#4-40 Round Knurled Thumb Nut, Stainless Steel 18-8, Passivated Finish, Pk5,20400007095