SVSX-M6-20-88 NBK Hex Socket Head Cap Vacuum Vented Screws with Ventilation Hole - High Intensity stainless M6 length 20mm Made in JapanSVSX M6 20 88 NBK Hex Socket Head Cap Screws with Ventilation Hole High Intensity stainless M6 length 20mm Hex Socket Head Cap Screws with Ventilation Hole High Intensity S. S. SVSX M6 20 88 MBK One Screw Characteristics: Made of high strength stainless steel (Strength class 8. 8). The ventilation hole easily releases gas trapped in the screw holes of equipment and machines, and supports vacuum drawing of vacuum devices. Excellent heat resistance and