Supply Of Hex. Head Screw Complete Consisting Of 4 Items For Mounting Of Drde Bio- Digester System 1 Hex. Head Screw M16x60 Property Class 10.9 To Is 1367 Pt.3-2002 To Is1364 Pt-2-2002. 2 Hex. Nut M16 Property Class 10 To Is: 1367 Pt.6-1994 To Is: 1364 Pt.3-2002 3 Spring Washer B16-is: 3063-1994 4 Hex. Thin Nut M16 Property Class 10 To Is: 1367 Pt.6-1994 To Specn.is:1364 Pt.4- 2003 Note: Items Shall Be Of Make Tvs Or Dfl Or Unbrako Or Tuff Only..