Gem Bids For Cheese Head Screw M6x22 To Is-1366 4.8, Fullthreaded, Head Edge To Be Rounded, Screw Edge Tobe Champ, Screw B1. M6.8gx25.48. 019 Gost: 17475-80or Countersunk Screw M6x25 To Is: 1365-4.8, Pitch1mm As Per Is, Screw B1. M6.8g X 30.48. 019, Gost:17475-80, Screw B1 M8-8g X 25.48. 019, Gost 17475-80.