Self Locking Nut, Thread size: 5/16'' UNF (DIN or Standard No. DIN 985) Tensile strength: 8.8S.3587https://75025d40dd58ab042ef4-3509ef0b9210fbf84c18b36ced24de7a.ssl.cf3.rackcdn.com/imagelibrary_sml/3587_pic1.jpgSparexBolt, Size: 5/16'' x 1-1/2'' UNF (DIN or Standard No. ASME B18.2.1) Tensile strength: 8.8.S.53788https://75025d40dd58ab042ef4-3509ef0b9210fbf84c18b36ced24de7a.ssl.cf3.rackcdn.com/imagelibrary_sml/53788_pic1.jpgSparexS.3587, S.53788